gppro_preview_buttons

Add additional buttons above the preview pane.
See Example

gppro_viewport_buttons

Add or remove viewport buttons that are displayed on top of the preview pane.
See Example

gppro_preview_pane

Modify the build structure of the preview pane area.
See Example

gppro_action_text

Add some optional text above the save and clear buttons.
See Example

gppro_action_title

Add an optional title above the save and clear buttons.
See Example

gppro_buttons

Add, remove, or modify the action buttons
See Example

gppro_admin_block_remove

Remove an entire block from the tabbed list and their related settings.
See Example

gppro_admin_block_add

Adding new blocks to the available set
See Example

gppro_sections

Adding a new section corresponding to a new admin block.
See Example

gppro_section_inline_SECTION

Add, remove, or modify individual portions of an existing section
See Example