This enumeration identifies attributes of protractor annotations.
| IG_ARTX_ATTR_PROTRACTOR_BOUNDS | Identifies annotation bounding rectangle. This is read-only property. |
| IG_ARTX_ATTR_PROTRACTOR_OPACITY | Identifies annotation opacity. |
| IG_ARTX_ATTR_PROTRACTOR_LINE | Identifies attributes of line used to draw annotation. |
| IG_ARTX_ATTR_PROTRACTOR_ASPECTRATIO | Identifies attributes of annotation aspect ratio. |
| IG_ARTX_ATTR_PROTRACTOR_STARTPOINT | Identifies start point of protractor. |
| IG_ARTX_ATTR_PROTRACTOR_ENDPOINT | Identifies end point of protractor. |
| IG_ARTX_ATTR_PROTRACTOR_HEADPOINT | Identifies head point of protractor. |
| IG_ARTX_ATTR_PROTRACTOR_ARCRADIUS | Identifies radius of arc drawn within protractor. |
| IG_ARTX_ATTR_PROTRACTOR_PRECISION | Identifies precision of protractor length displayed. |
| IG_ARTX_ATTR_PROTRACTOR_FONT | Identifies attributes of annotation font. Font is specified as AT_ARTX_FONT structure. |
| IG_ARTX_ATTR_PROTRACTOR_LOGFONT | Identifies attributes of annotation font. Font is specified as AT_LOGFONT structure. |
| IG_ARTX_ATTR_PROTRACTOR_HITTEST_BOUNDS | This value has been deprecated and will be removed from the public API in a future release. |