ART Button mark.
| IG_ARTX_button_bounds_get | Queries the bounding rectangle of annotation. |
| IG_ARTX_button_bounds_set | Updates the bounding rectangle of annotation. |
| IG_ARTX_button_create | Creates a new instance of Button annotation (IG_ARTX_MARK_BUTTON). |
| IG_ARTX_button_fillcolor_get | Queries button fill color. |
| IG_ARTX_button_fillcolor_set | Updates button fill color with new value. |
| IG_ARTX_button_font_get | Queries button text font. |
| IG_ARTX_button_font_set | Updates button text font. |
| IG_ARTX_button_logfont_get | Queries button text font. |
| IG_ARTX_button_logfont_set | Updates button text font. |
| IG_ARTX_button_opacity_get | Queries the opacity value of annotation. |
| IG_ARTX_button_opacity_set | Sets the opacity value of annotation. |
| IG_ARTX_button_orientation_get | Queries value of button text orientation. |
| IG_ARTX_button_orientation_set | Sets value of button text orientation. |
| IG_ARTX_button_state_get | Queries the state of button. Button has 2 states: pressed and not pressed. |
| IG_ARTX_button_state_set | Sets the state of button. |
| IG_ARTX_button_text_get | Queries button text string. |
| IG_ARTX_button_text_set | Updates button text string. |
| IG_ARTX_button_textcolor_get | Queries button text color. |
| IG_ARTX_button_textcolor_set | Updates button text color with new value. |