rs
3, your XDA already does most of this:
Control Panel > Clock and Region > Region > Additional settings:
To get a Comma as the Decimal Separator, you change the decimal symbol through MS Windows. You can type in any symbol or even use Character Map.
The Number of digits after the decimal point can also be set in the same form. I use three; Xara's default is two.
If you pick a comma, you need to change Digit grouping symbol away from a comma. I tried a tick buy again you can use any symbol.
In my example, I used a Scale Factor of 1cm to 20m and created a line of a random metre length with 3 digits after the decimal point, which I entered as a comma and even as a full stop; both returned a comma.
Mixing units on the page for the 20cm line is harder.
I input the reverse value to get the right line then. This produced a spurious number and dimension which I over types with 20cms. The 's' locks the line so if you change its length the value remains.
Inkscape clearly does the job and is free. It all depends if your drawings need dynamic changes. If so stick with Xara for those and copy and paste the Inkscape shapes for the static parts.
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