If you have access to the developer’s version, you can change the code that specifies how the tracking output is displayed.
At line 470 in the TrackObjects module:
text(CurrentLocations(:,1) , CurrentLocations(:,2) , text_string,...
'HorizontalAlignment','center', 'color', .6 .6 .6],'fontsize',10,...
The ‘fontsize’ setting of 10 could be replaced with handles.Preferences.FontSize, which is set from the Preferences dialog in CellProfiler.
At line 488 in TrackObjects:
CPimcapture is a function in CPsubfunction which renders the figure window. The third argument specfifies the dots per inch (dpi) and can be increased to your liking.