Hi Boaz,
The only user interface to the label font size and style is the Preferences (open from Favorites menu), category: Labels.  You could change the size number and make the style bold. This is for all “3D” atom and distance labels that move along with the structure; size/font of 2D labels that don’t move with the structure can be set individually.

Looks like the Labels Preferences size menu only goes up to 36, but you can enter some bigger number… for example, I entered 50 (see screenshot attached).   Smaller size changes were barely perceptible on my high-resolution screen; maybe that is what happened for you.

If that doesn’t work, I’m at a loss… maybe some weird rendering problem?  I hope this helps,
Elaine
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Elaine C. Meng, Ph.D.                       
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco



On Oct 21, 2017, at 4:31 AM, Boaz Shaanan <bshaanan@bgu.ac.il> wrote:

Hi,
The number that shows up after creating a distance is very thin and can hardly be seen. I couldn't find how to make it thicker (I did change the actual line thickness in the menu). I also tried in the preference menu that you pointed to a user a while ago but it didn't work for me. How can I change it? This is on the Windows 64b nightly build from 17 October. Thanks.
Boaz