Scale bars are on the figure, NOT in the figure legend. Figures are at most twice the size that they will appear when printed and lines are of proper thickness to be successfully reduced. Use glue stick to attach just the top edge of each panel to the paper. If loose panels are sent in to be mounted in a single figure, there is a layout diagram for the figure. Any unevenness will cause distortion of the final image.
Symbols are legible and reduction has been taken into consideration.