Click the first worksheet tab you want to group
Hold down Ctrl and click additional worksheet tabs to group specific sheets
To group adjacent sheets, click the first tab, hold Shift, and click the last tab
Right-click any selected sheet tab and choose Select All Sheets to group every worksheet
To ungroup sheets, right-click a grouped tab and choose Ungroup Sheets
To ungroup all sheets, click any sheet tab that is not grouped
Check the title bar for the word Group to confirm worksheets are grouped