You have to do the following steps:
1. Use Tools/Measurements/Calibration.
2. Click and hold down the left key of the mouse and move the cursor. After that, release left mouse button.
3. Enter distance in calibration dialog.
4. It's done.
You have to do the following steps:
1. Use Tools/Measurements/Calibration.
2. Click and hold down the left key of the mouse and move the cursor. After that, release left mouse button.
3. Enter distance in calibration dialog.
4. It's done.
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