LazPaint is a painting program like PaintBrush or Paint .Net implementing drawing functions directly in Free Pascal. The drawing takes into account the level of transparency (alpha channel), shape borders are rendered with antialiasing, and color composition includes gamma correction.
Many common actions can be done with the toolbar. Zoom can be changed with the magnifying glass (+ or -), or by clicking on the 1:1 button to show the image at its original size in pixels, or with the zoom fit button to set the zoom so that the whole image be within the window.
It is possible to do/undo the 50 last operations. If you have a doubt on what you are drawing, undo back to the beginning, save a copy, and redo the modifications before going further.