The category "<display_control_operation-gapsout_null-gapsin_null>" can be expressed as follows:

<display_control_operation-gapsout_null-gapsin_null>

<center_operation-gapsout_null-gapsin_null>

<display_verb> <displayable_thing-gapsout_null-gapsin_null>

<normalize_pvd_operation>

<pan_operation-gapsout_null-gapsin_null>

<scale_operation-gapsout_null-gapsin_null>

<zoom_operation-gapsout_null-gapsin_null>