Strayos allows users to draw 2D annotation lines with an angle snapping feature (similar to the AutoCAD function Object Snap). To utilize this feature, click on the 2D annotation line in the top tool bar.
Users will then see a toggle appear in the upper right hand corner of their model, where they can turn on the Object Snap Angle. The angel can be changed as desired, and the annotation will snap to the determined angle when drawing. See clip below on how a 90 degree angle can be drawn. Notice how the annotation feature will reference the first point selected to determine the angle measurement. Once this point is selected, the angle the user has set will guide the next point drawn.