Typing values: units, arithmetic, dates and KW

Every number field in arcraum, in the Properties panel, the tool options and the settings, reads what you type the way you would write it on a sketch: with a unit, as a sum, with a decimal comma. Date fields take a calendar week as readily as a date.

Numbers with a unit or a sum

The grey unit at the end of a field says what it counts in, mostly mm. You can type more than a plain number:

a unit: 25 cm in an mm field is 250 mm, 2,75 m is 2750 mm,
arithmetic: 2750+240, (500-20)/2, 3*1250,
a decimal comma or a decimal point: 36,5 cm and 36.5 cm are the same.

While the text isn't a plain number, the field shows under it what it comes to, such as = 2990 mm. Nothing is written until you take it.

The walls' Height typed as 2750+240: the field shows = 2990 mm under it

Taking a value: Enter, Esc and the preview

In the Properties panel a change shows on the plan, in 3D and in the areas while you type, without being stored yet:

Enter, or leaving the field, takes it: one step of undo, with an entry in the history.
Esc gives back the stored value and ends the preview.
With several elements selected that differ, the field is empty and reads "mixed"; what you type there goes to all of them.

On a settings page the fields wait for the save bar at the bottom instead, which saves everything at once.

Dragging a number

Press on a number field with the mouse and drag: to the right raises the value, to the left lowers it, one step per pixel, mostly 1 mm. The plan follows as you drag. Letting go takes the value as one step of undo; Esc while you still hold the button takes the drag back.

Dragging a wall's Thickness to the right: the wall on the plan grows with it, and letting go takes it

A click without moving puts the cursor in the field to type, as usual.
In a field that already has the cursor, a drag selects text instead.
A field reading "mixed" doesn't drag: there is no number to count from.
On a touch screen a finger scrolls, so there you type.

Dates and calendar weeks

A date field shows a date as 22/03/2027 in English and 22.03.2027 in German, but takes many forms:

the full date, or short: 8/11/26, 8.11.26, 8.11. or 8.11, without a year meaning this year,
ISO: 2026-11-08, and ISO weeks: 2027-W12,
a calendar week: KW 12, KW 12/27, KW 12/2027, and in English also week 12, Wk 12, W12 or CW 12. A week means its Monday.

A two-digit year is the one nearest today: in 2026, 27 is 2027 and 77 is 1977. A day that doesn't exist, such as 31.02., is refused by name.

Under a filled field arcraum shows the weekday and the week, for example "Monday · week 12", so a date taken over from a phone call can be checked at once.

The Start of a project typed as week 12/27: the field shows the weekday and week, and on leaving it the date

The calendar

The button at the end of the field, or Alt+↓ in it, opens a month view: Monday first, the calendar week beside each row, today marked.

‹ and › go a month back or on, « and » a year.
The arrow keys move by a day and a week, PageUp and PageDown by a month, with Shift by a year; Home and End go to the ends of the week.
Enter or Space picks the day, Esc goes back to the field, and a click elsewhere closes it.