Different Sketches Referencing Each Other

[duckmug]

Lets say that I create a part that is simply a rectangle and I use the symmetry constraint in its sketch for both axis.

Lets say that I want to create a separate sketch that has a hole that I want to add.

Since the rectangle part expands upon dimension change in both directions, the origin is not a good reference point for the hole.

What could be used as a reference point for the hole positioning?

I know that I can do both in the same sketch but I want to examine the case of having separate sketches.

Should the positioning always be handled in the sketches or the sketch mapping attachment settings are also good to be used?

[drmacro]

There are different approaches of course, but a simple external reference is typical:

Snip macro screenshot-08b3b2.png (59.22 KiB) Viewed 388 times

Here one is done in Part Design and another in Part.

[duckmug]

That's fantastic! Was not aware of it, thank you!

[duckmug]

Do you have some information on how those reference points are added? I cannot find it.

[drmacro]

Let your fingers do the walking...first hit on search: 'freecad sketcher external':

https://wiki.freecadweb.org/Sketcher_External

[duckmug]

Yeah I searched and came across that but I thought it was not that

Update: I figured it out! Thanks!