Selection tools – Polygonal Lasso

  • This tool allows you to select area of the image by series of straight edges. When selection is applied to the image then other tools (e.g. paint tools, filters, …) affects only selected area. This tool also provides additional settings for more precise control. 

How to use
  • Position cursor over the image in the place where you want to start. Click-Left mouse button to create first vertex. Move mouse cursor and click again. Each click creates new vertex of the polygon. You can remove previously created vertex by pressing “Backspace” key or by clicking right mouse button (menu will appear). Once you created desired number of the vertices, then you can finish the process by clicking in the same place in which is positioned first vertex or by pressing “Enter” key or by clicking right mouse button (menu will appear). 

  • You can also combine previous selection with new selection by using selection modes. 

  • Selection can be canceled by pressing keys Ctrl+D or in the application menu “Selection->Deselect”. 

  • Selection can be inverted by pressing keys Shift+Ctrl+I or in the application menu “Selection->Invert Selection”. 

  • All image can be selected by pressing keys Ctrl+A or in the application menu “Selection->Select All”. 

  • Selection can be moved in the following way. Position mouse cursor over the selected area. If all conditions are met then cursor should change to “black arrow”. Press and hold left mouse button and move the mouse over the image. Selected area will follow mouse movements. Release left mouse button.  

  • Selection applies to whole image.  

Tool settings


  1. 1.Sets selection mode. 

  2. 2.Sets whether selection edges will be anti-aliased. 

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