Marks and numbering

A mark is the short code that identifies a door, a window or another element on drawings and in schedules: D01, W-101, C3. Its tags and the schedules show it, so they always agree.

Typing a mark

Select the element and type in Mark in Properties, under its name. Leave the field empty and the element takes the number the project's rules give it; the empty field shows that number in grey.

If another element already has the same mark, Properties says so under the field. Select them picks the others.

Numbering rules

File > Mark numbering… sets how elements without a typed mark are numbered. Each kind of element has its own rule:

• Number: number this kind automatically. When it is off, only typed marks show, and a tag shows what it showed before (a wall's material and thickness, for example).
• Prefix and Sep.: the letters before the number, and what goes between them: D and nothing gives D01, D and - gives D-01.
• Digits: how many digits the count has, with leading zeros.
• By level: put the level's number before the count, and start the count again on each level. Level 1, door 1 is D-101; level 2, door 3 is D-203.
• Order: Model order counts in the order the elements were made, lowest level first. Clockwise per level goes round each level from the top of the plan.
• From: the first number.

Ground level number is the number of the lowest level at or above ±0. Levels above count up from it and levels below count down, so a site level under the ground floor is level 0.

The D01, W01 and D-101, W-101 buttons set the usual two schemes. The rules belong to the project. Save rules… writes them to a file and Load rules… reads one, so an office can use the same numbering in every project.

Renumbering

The rules number elements live: add a door and the doors after it move up by one. When the numbers are settled, Renumber writes them onto the elements as their marks, so later changes leave them alone and new elements take the next free numbers. Pick one kind or every kind. With Replace typed marks too, every element is numbered afresh from the rules.

Marks from names is for models whose marks were written into the names, such as "D-101 sliding doors": each element takes the code at the start of its name as its mark.

Checking for duplicates

The bottom of the dialog lists every mark that more than one element has, with a Select button for each. Objects of one type share their type's mark on purpose, so they are not counted twice.

In IFC

A mark is written as the element's IFC Tag and read back from it when an IFC file is imported.