To see what scaling applies to the currently loaded drawing we have 2 options.
1. Viewing the image statistics
We can see the drawing size by using the following menu option:- File Menu > Raster > Statistics… This will display the following dialogue:
The above example drawing has a DPI (pixels per inch) value of 300. The drawing height is 504 pixels. This means that the drawing height in inches = 504 / 300 = 1.68 inches
2. Measure a specific part of your image
If we wish to know the size of some part or element of the loaded image then we can use the following measurement option. Press the Ctrl+D keyboard keys. Position your cursor at the start of the distance you want to measure. Press down your left mouse button.
Holding down your left mouse button, move your mouse to the end of the distance you want to measure. Raise your left mouse button.
The measured pixel distance together with the distance in cm and inches (using the current DPI) is displayed in an information box displayed as follows.
The Ctrl+D can be used on either the raster or vector image.
If used on the vector image then it is possible to snap to the start and end vectors being measured.