1 To insert a check box for a printout, click the âInsertâ tab. 2  Click the arrow for the âSymbolâ button in the âSymbolsâ group. 3  Click âMore Symbols.â A gallery of symbols appears. 4  Click the preferred symbol.5  Click âInsert.â The empty check box appears on the screen and printout. To insert a check box for a printout, click the âInsertâ tab. 2  Click the arrow for the âSymbolâ button in the âSymbolsâ group. 3  Click âMore Symbols.â A gallery of symbols appears. 4  Click the preferred symbol.