XL_TICK_MARK

Specifies a type of axis tick for a chart.

Example:

from pptx.enum.chart import XL_TICK_MARK

chart.value_axis.minor_tick_mark = XL_TICK_MARK.INSIDE

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CROSS

Tick mark crosses the axis

INSIDE

Tick mark appears inside the axis

NONE

No tick mark

OUTSIDE

Tick mark appears outside the axis