You can add midpoints simply by:

  1. Create a perimeter of the room
  2. Hover over your perimeter line where you wish to place a midpoint
  3. Tap the point button. 
  4. Label your created segment

You can also measure segments of objects throughout your room by:

  1. Placing a point
  2. Create the segment by placing the another point. 
  3. Tap the finish button 

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