Is it possible to set the colour or font of markers (e.g. the ones set by gud in
gud-display-line by using
make-marker). The theme I am using shows markers in a difficult-to-see light gray. I would prefer something very obvious (e.g. red) and potentially also slightly larger.
There is no information on setting or modifying colour/size in the gnu elisp manual. I'm not sure how this should work.
note: I am using spacemacs. The questions I believe is not specific to spacemacs, but I would also welcome an easy setting for doing this in spacemacs.