TechDraw: problems with snapping

[koluna]

OS: Linux Mint 18.1 Serena
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.15860 (Git)
Build type: Release
Branch: master
Hash: 3b708c7f84b0425076b520e1d95627b20fd75fe0
Python version: 2.7.12
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/UnitedKingdom (en_GB)

Hi!
I want to snap to the center of a circle (crossing two lines) to make a dimension line. But it is very difficult.
Do I make something wrong? Teach me, please

[chrisb]

Moved to TechDraw forum.

[chrisb]

Maybe this should respect Preferences->Display->Colors->PickRadius.

[koluna]

Maybe this should respect Preferences->Display->Colors->PickRadius.

Hmmm...
It seems, it does not work...
There is not any difference between 5 and 50...

[chrisb]

That's what I meant, it does not respect the pick radius. The line thickness can well be controlled, but the pick radius seems to stay at one or two pixels.

[koluna]

Thanks.
I am sad...
I have some parts (bodies). And I have some drawings these parts. The drawings have a lot of dimensions. I should alter my parts and drawings too.
Topic's problem and face changing kill me...
I am very very sad

[chrisb]

For now you can try a screen magnifier. I have a different Linux distro, but I'm sure there is one available for your system too.

[wandererfan]

Maybe this should respect Preferences->Display->Colors->PickRadius.

Didn't know about this preference. We do something similar for Edges, maybe CenterMarks won't be too different.

[koluna]

For now you can try a screen magnifier. I have a different Linux distro, but I'm sure there is one available for your system too.

Hmmm... what did You mean? Did You mean to increase a scale with a mouse wheel (zoom in) or something else? Did You mean special facilities?

[koluna]

maybe CenterMarks won't be too different.

Can it help me? Where is it?