User`s manual
V 1   P R O F E S S I O N A L   5 . 7  
 48
Lines 
The 
Free
 and 
Spline
 line tools have their own buttons. The other line tools, however, 
share one button.  To change among the 
Vertical
, 
Horizontal
, and 
Diagonal
 line tools, 
hold down the button that’s currently displayed to reveal a menu. 
Free
: draws freehand, just like using a pencil. Each time you press the mouse 
button (or push down on the pen), you begin a new line. 
Spline
: automatically draws a smooth curve between the points you click, in 
the order that you click them.  When drawing a spline, you may click on the 
video to add new points, or click and drag the white rectangles that designate 
existing points.  Only one spline may exist per video.  If a spline already exists when 
you click the 
Spline
 button, it is “brought forward” to be edited.  To remove it and 
start over, click the 
Undo
 button. 
Vertical
: constrains the line you draw to be straight up and down. 
Horizontal
: constrains the line you draw to be level.  
Diagonal
: lets you  draw a  line  at any  angle you want.  Whether or  not the 
angle measurement persists on the screen is determined by a software option.  
Angles 
The angle tools share a single button.  To switch between these tools, hold down the 
angle tool button that is currently displayed. 
Variable
: allows you to draw an angle of any degree.   Position the cursor at 
one of the endpoints of the angle.  Click and draw the first leg of the angle 
toward the apex (corner).  Release the button and reposition the cursor at the 
other endpoint.    Now  when you click and  draw, an  angle measurement will appear. 
Release the mouse button to complete the angle. 
Right
: only right angles are drawn. Begin at the apex (corner), then click and 
draw in the direction of one of the endpoints. 
Posture
: draws posture angles, which are comprised of three lines with angle 
measurements at the hip and knees. To draw a posture angle, click and draw 
a line from the shoulders to the hips.  Then, click the knees and then finally 
the ankles. 










