You can bookmark points of interest along vessels in panoramic images.
To add a bookmark:
1. Select a panoramic image.
2. Place the cross-section marker on the desired point.
3. Click Mark Point of Interest 
.
4. Select Bookmark from the drop-down menu.
A bookmark marking is displayed on the current position of the cut point, and has the label P1, P2, . . . If you move your cut point, the bookmark stays where it is.
5. If required, add additional bookmarks on the image.
Each bookmark has a sequential number.
To move a bookmark:
Click the bookmark and drag it to the required position.
To delete a bookmark:
1. Select the bookmark.
2. Press Delete.
To delete all bookmarks:
1. Select the panoramic image.
2. Click Reset.
All changes you made to the vessel in this session are deleted.