Polygon tool in paint is used to reshape an existing line, rectangle.

MS Paint use black as foreground and white as background colour.

When you save a picture with a different name by using save as command then the picture with the new name is active. 

Different brush styles available in paint are four.

Colour tool in paint is used to select a colour on the active layer to either of the primary or secondary colour slots.

Select tool in paint is used to rectangular, ellipse, lasso. magic wand.

The key combination is used to enlarge the eraser is ctrl+.

Magnifier tool in paint is used to zoom in and zoom out the picture.

In MS Paint files can open at a time is 1. When we will try to open two files at a time it ask do save or not save or cancel.

Sizes of the erasers are available in paint tool box are two.

The colour of the increased area be the colour of the existing drawing area when you increase the size of the drawing area.

Maximum size to which you magnify the picture is 8x.

Default extension of paint file is .bmp.

The key combination should we use to draw the perfect straight line is shift + line tool.