To mark a point, first open or activate the desired photograph.
To mark a point:
•
Pick up the Point Marking tool 
, or select
"Mark Points Mode" from the ribbon toolbar’s Create Tab.
• Click this tool on the location to be marked.
A Marked Point symbol will appear at the location marked. Each additional click will produce a new Marked Point symbol. The photograph being marked may be magnified to allow more precise marking.
• Repeat step 2, until all of the points you require on this photograph have been marked.
Note: If the Point Marking tool is clicked on top of or very close to an existing Marked Point symbol, the position "snaps" to that Marked Point and a new point is not created.
Hint: To increase the precision and ease of marking it is a good idea to maximize the size of the Photograph Window and to zoom-in on the point being marked. See Changing the Magnification of a Photograph.
The user should mark each point that is required in the 3D model. For instance if you are modeling the house shown below, the points A through H, at the very least, will be of interest to you. They should be marked on each photograph on which they are visible.
Marking the corners of a house.