You may take one of the generic footprints. e.g. 0805_*, 1206_*, etc.
However, there are dedicated capacitor footprints in the m4 lib.
Run pcb, and choose from the library window:
( Window - Library- pcblib- ~generic, Capacitor* )
I prefer to convert m4 footprints to newlib format, rather than deal with
the necessary parameters. This is how I do the conversion: Import one of
them to he pcb drawing area, copy the footprint to buffer and save it as
an element to my local pcb library.
Hope, that helps,