1. Save
   • Use the menu item named "Save" under "Project"
   • Follow the instructions displayed in the popup
2. Load
   • Use the menu item named "Load" under "Project"
   • Choose the .txt file on your computer and click "Load"

There is two ways to do it:

1. You can drag the lens to the bottom right border and drop it on the trash. The trash appear when you drag a lens.

2. You can click on trashes found in the table on the right.

   If you click on the trash placed in the header of the table, all lens will be deleted.

1. Use the dropdown menu named "Move" and select what you want.
   
   
   
2. It's also possible to use keyboard shortcut :
   • Free : [Any Key]
   • Previous : [s]
   • Next : [d]
   • Keep F : [f]
   • Keep Diameter : [g]

1. With the mouse wheel
2. With the Zoom menu in the toolbar