Heuristic: 3 User control and freedom\
Severity: 3\
Problem: This button is clickable when there aren't any valid objects to click on the sphere to create this object.\
Solution: This button should only be clickable if at there as least one MEASURE_ANGLE object on the sphere.
Heuristic: 3 User control and freedom\ Severity: 3\ Problem: This button is clickable when there aren't any valid objects to click on the sphere to create this object.\ Solution: This button should only be clickable if at there as least one MEASURE_ANGLE object on the sphere.