Waveform graph - Number of major ticks on x scale

Hello all!

I'm trying to display meteorological measurements throughout a day in a minute resolution. For that purpose I'm using a Waveform Chart with fixed length on x-axis (0-1440). However, major ticks are distributed by 100, i.e. 0, 100, 200, 300, ..., 1400, 1440. How can I distribute these points by 60, so that I can put hour labels 00:00, 01:00, 02:00 etc.

Thanks!

Regards,

Marko.