Put a fixation cross on top of a image in Expyriment?
This should work:

picture = expyriment.stimuli.Picture("/path/to/picture.jpg")
fixcross = expyriment.stimuli.FixCross()
picture.present(update=False)
fixcross.present(clear=False)


Alternatively, you can first plot the fixation cross on top of the picture and then present it:

picture = expyriment.stimuli.Picture("/path/to/picture.jpg")
fixcross = expyriment.stimuli.FixCross()
fixcross.plot(picture)
picture.present()