The chart axes can be set independently with a variety of custom effects. The options shown here apply to the vertical axis in 3D charts.

ch.Set 'zstyle' 'grid,forcezero'

Options

forcezero:noforce	Axis must include zero in range
exact:extend	Axis will not be rounded up to the next whole tick mark
atside:atend	Caption placement
ntick:plain:noaxis	Tick mark style
grid:nogrid	Draw gridlines from Z-ticks around backplanes
altitude:noaltitude	Shade tiles to indicate height
labels:nolabels	Omit labels if required
flat:noflat	Force flat captions and labels on 3D charts

All 3D charts have the tickmarks drawn outwards (style ‘ntick’), as either of the other normal styles can interfere with the grid when the chart is projected. Options shown in bold are the defaults.