There are a few ways to remove dotted lines in Photoshop. The first way is to use the command “line-by-line.” This command will remove all the lines in a document, except the ones that are defined by the line-by-line command. The second way is to use the “select all” command and then use the “delete” button. The third way is to use the “command+click” combination on a line and then select everything else in the document.