hi,
Right click the tool bars at the top of the sheet.
you will get a pop up. click customize at the bottom.
the customise dialog box will pop up. click the command
tab. in the left pane, click format. in the right pane,
scroll down untill you find the icons you are missing.
left click and hold. drag the icon to the place on the
tool bar you want it to be. repeat for the other icon.
when done close the customize dailog box.
