The format painter is a tool used to copy a control's format to multiple controls. You can use it to easily create identical controls, without the need to build them from scratch every time.
The field Title has a red background, which we want to copy to another control present on the form.
We enter the Editor, select the c_Title field and press on the Format Painter icon.
The standard pointer changes to a black dot. We use the black dot to click on the controls we want to copy c_Title's red background format. We select c_Control1 and click on Save.
As we can see, the Date has a red background.