Zoom
The Zoom tool  is designed to change the image scale. To increase the scale, press the button and left-click on the image in the AKVIS MultiBrush window. To decrease the image scale, right-click on the image. You can use hotkeys to change the image scale: + and Ctrl++ ( ++ on Macintosh) zoom in, - and Ctrl+- (+- on Macintosh) to zoom out.
It is also possible to increase the scale of the selected area. For this purpose press and select a rectangular area. When the rectangular area is selected, the image scale will be changed so that the selected part of the image will fill the whole window.
Increase the scale of the selected area
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— Zoom