diff --git a/docs/changelog.txt b/docs/changelog.txt
index 57cd2f6f6..4c034b5bc 100644
--- a/docs/changelog.txt
+++ b/docs/changelog.txt
@@ -66,6 +66,7 @@ changelog.txt uses a syntax similar to RST, with a few special sequences:
 - ``widgets.EditField``: the ``key_sep`` string is now configurable
 - ``widgets.EditField``: can now display an optional string label in addition to the activation key
 - ``widgets.EditField``: views that have an ``EditField`` subview no longer need to manually manage the ``EditField`` activation state and input routing.  This is now handled automatically by the new ``gui.View`` keyboard focus subsystem.
+- ``materials.ItemTraitsDialog``: new dialog to edit item traits (where "item" is part of a job or work order or similar). The list of traits is the same as in vanilla work order conditions "``t`` change traits".
 
 # 0.47.05-r5
 
diff --git a/library/lua/gui/materials.lua b/library/lua/gui/materials.lua
index 8894b36af..c9eaaf38d 100644
--- a/library/lua/gui/materials.lua
+++ b/library/lua/gui/materials.lua
@@ -343,4 +343,266 @@ function ItemTypeDialog(args)
     return dlg.ListBox(args)
 end
 
+function ItemTraitsDialog(args)
+    local job_item_flags_map = {}
+    for i = 1, 3 do
+        for _, f in ipairs(df['job_item_flags'..i]) do
+            if f then
+                job_item_flags_map[f] = 'flags'..i
+            end
+        end
+    end
+    local job_item_flags = {}
+    for k, _ in pairs(job_item_flags_map) do
+        job_item_flags[#job_item_flags + 1] = k
+    end
+    table.sort(job_item_flags)
+    --------------------------------------
+    local tool_uses = {}
+    for i, _ in ipairs(df.tool_uses) do
+        tool_uses[#tool_uses + 1] = df.tool_uses[i]
+    end
+    local restore_none = false
+    if tool_uses[1] == 'NONE' then
+        restore_none = true
+        table.remove(tool_uses, 1)
+    end
+    table.sort(tool_uses)
+    if restore_none then
+        table.insert(tool_uses, 1, 'NONE')
+    end
+    --------------------------------------
+    local set_ore_ix = {}
+    for i, raw in ipairs(df.global.world.raws.inorganics) do
+        for _, ix in ipairs(raw.metal_ore.mat_index) do
+            set_ore_ix[ix] = true
+        end
+    end
+    local ores = {}
+    for ix in pairs(set_ore_ix) do
+        local raw = df.global.world.raws.inorganics[ix]
+        ores[#ores+1] = {mat_index = ix, name = raw.material.state_name.Solid}
+    end
+    table.sort(ores, function(a,b) return a.name < b.name end)
+
+    --------------------------------------
+    -- CALCIUM_CARBONATE, CAN_GLAZE, FAT, FLUX,
+    -- GYPSUM, PAPER_PLANT, PAPER_SLURRY, TALLOW, WAX
+    local reaction_classes_set = {}
+    for ix,reaction in ipairs(df.global.world.raws.reactions.reactions) do
+        if #reaction.reagents > 0 then
+            for _, r in ipairs(reaction.reagents) do
+                if r.reaction_class and r.reaction_class ~= '' then
+                    reaction_classes_set[r.reaction_class] = true
+                end
+            end
+        end --if
+    end
+    local reaction_classes = {}
+    for k in pairs(reaction_classes_set) do
+        reaction_classes[#reaction_classes + 1] = k
+    end
+    table.sort(reaction_classes)
+    --------------------------------------
+    -- PRESS_LIQUID_MAT, TAN_MAT, BAG_ITEM etc
+    local product_materials_set = {}
+    for ix,reaction in ipairs(df.global.world.raws.reactions.reactions) do
+        if #reaction.products > 0 then
+            --for _, p in ipairs(reaction.products) do
+            -- in the list in work order conditions there is no SEED_MAT.
+            -- I think it's because the game doesn't iterate over all products.
+                local p = reaction.products[0]
+                local mat = p.get_material
+                if mat and mat.product_code ~= '' then
+                    product_materials_set[mat.product_code] = true
+                end
+            --end
+        end --if
+    end
+    local product_materials = {}
+    for k in pairs(product_materials_set) do
+        product_materials[#product_materials + 1] = k
+    end
+    table.sort(product_materials)
+    --==================================--
+
+    local function set_search_keys(choices)
+        for _, choice in ipairs(choices) do
+            if not choice.search_key then
+                if type(choice.text) == 'table' then
+                    local search_key = {}
+                    for _, token in ipairs(choice.text) do
+                        search_key[#search_key+1] = string.lower(token.text or '')
+                    end
+                    choice.search_key = table.concat(search_key, ' ')
+                elseif choice.text then
+                    choice.search_key = string.lower(choice.text)
+                end
+            end
+        end
+    end
+
+    args.text = args.prompt or 'Type or select an item trait'
+    args.text_pen = COLOR_WHITE
+    args.with_filter = true
+    args.icon_width = 2
+    args.dismiss_on_select = false
+
+    local pen_active = COLOR_LIGHTCYAN
+    local pen_active_d = COLOR_CYAN
+    local pen_not_active = COLOR_LIGHTRED
+    local pen_not_active_d = COLOR_RED
+    local pen_action = COLOR_WHITE
+    local pen_action_d = COLOR_GREY
+
+    local job_item = args.job_item
+    local choices = {}
+
+    local pen_cb = function(args, fnc)
+        if not (args and fnc) then
+            return COLOR_YELLOW
+        end
+        return fnc(args) and pen_active or pen_not_active
+    end
+    local pen_d_cb = function(args, fnc)
+        if not (args and fnc) then
+            return COLOR_YELLOW
+        end
+        return fnc(args) and pen_active_d or pen_not_active_d
+    end
+    local icon_cb = function(args, fnc)
+        if not (args and fnc) then
+            return '\19' -- ‼
+        end
+        -- '\251' is a checkmark
+        -- '\254' is a square
+        return fnc(args) and '\251' or '\254'
+    end
+
+    if not args.hide_none then
+        table.insert(choices, {
+            icon = '!',
+            text = {{text = args.none_caption or 'none', pen = pen_action, dpen = pen_action_d}},
+            reset_all_traits = true
+        })
+    end
+
+    local isActiveFlag = function (obj)
+        return obj.job_item[obj.ffield][obj.flag]
+    end
+    table.insert(choices, {
+        icon = '!',
+        text = {{text = 'unset flags', pen = pen_action, dpen = pen_action_d}},
+        reset_flags = true
+    })
+    for _, flag in ipairs(job_item_flags) do
+        local ffield = job_item_flags_map[flag]
+        local text = 'is ' .. (value and '' or 'any ') .. string.lower(flag)
+        local args = {job_item=job_item, ffield=ffield, flag=flag}
+        table.insert(choices, {
+            icon = curry(icon_cb, args, isActiveFlag),
+            text = {{text = text,
+                    pen = curry(pen_cb, args, isActiveFlag),
+                    dpen = curry(pen_d_cb, args, isActiveFlag),
+            }},
+            ffield = ffield, flag = flag
+        })
+    end
+
+    local isActiveTool = function (args)
+        return df.tool_uses[args.tool_use] == args.job_item.has_tool_use
+    end
+    for _, tool_use in ipairs(tool_uses) do
+        if tool_use == 'NONE' then
+            table.insert(choices, {
+                icon = '!',
+                text = {{text = 'unset use', pen = pen_action, dpen = pen_action_d}},
+                tool_use = tool_use
+            })
+        else
+            local args = {job_item = job_item, tool_use=tool_use}
+            table.insert(choices, {
+                icon = ' ',
+                text = {{text = 'has use ' .. tool_use,
+                        pen = curry(pen_cb, args, isActiveTool),
+                        dpen = curry(pen_d_cb, args, isActiveTool),
+                }},
+                tool_use = tool_use
+            })
+        end
+    end
+
+    local isActiveOre = function(args)
+        return (args.job_item.metal_ore == args.mat_index)
+    end
+    table.insert(choices, {
+            icon = '!',
+            text = {{text = 'unset ore', pen = pen_action, dpen = pen_action_d}},
+            ore_ix = -1
+        })
+    for _, ore in ipairs(ores) do
+        local args = {job_item = job_item, mat_index=ore.mat_index}
+        table.insert(choices, {
+            icon = ' ',
+            text = {{text = 'ore of ' .. ore.name,
+                    pen = curry(pen_cb, args, isActiveOre),
+                    dpen = curry(pen_d_cb, args, isActiveOre),
+            }},
+            ore_ix = ore.mat_index
+        })
+    end
+
+    local isActiveReactionClass = function(args)
+        return (args.job_item.reaction_class == args.reaction_class)
+    end
+    table.insert(choices, {
+            icon = '!',
+            text = {{text = 'unset reaction class', pen = pen_action, dpen = pen_action_d}},
+            reaction_class = ''
+        })
+    for _, reaction_class in ipairs(reaction_classes) do
+        local args = {job_item = job_item, reaction_class=reaction_class}
+        table.insert(choices, {
+            icon = ' ',
+            text = {{text = 'reaction class ' .. reaction_class,
+                    pen = curry(pen_cb, args, isActiveReactionClass),
+                    dpen = curry(pen_d_cb, args, isActiveReactionClass)
+            }},
+            reaction_class = reaction_class
+        })
+    end
+
+    local isActiveProduct = function(args)
+        return (args.job_item.has_material_reaction_product == args.product_materials)
+    end
+    table.insert(choices, {
+            icon = '!',
+            text = {{text = 'unset producing', pen = pen_action, dpen = pen_action_d}},
+            product_materials = ''
+        })
+    for _, product_materials in ipairs(product_materials) do
+        local args = {job_item = job_item, product_materials=product_materials}
+        table.insert(choices, {
+            icon = ' ',
+            text = {{text = product_materials .. '-producing',
+                    pen = curry(pen_cb, args, isActiveProduct),
+                    dpen = curry(pen_d_cb, args, isActiveProduct)
+            }},
+            product_materials = product_materials
+        })
+    end
+
+    set_search_keys(choices)
+    args.choices = choices
+
+    if args.on_select then
+        local cb = args.on_select
+        args.on_select = function(idx, obj)
+            return cb(obj)
+        end
+    end
+
+    return dlg.ListBox(args)
+end
+
 return _ENV