Noob Questions ??Follow

Hi their , just started and wanted to know about the quick/hot bar . I know that i should choose the ability from the specialization and magic menu and drop it to the assigned number and so on . When i last logged out i had the command Attack at slot number 1 but when i logged in again i saw my quick bar empty !! I checked all the quickbar from 1-10 and they were all empty so i re assigned the commands to the numbers .. my question is I couldn't find the Attck command ( the yellow sword ) to assign it back at number 1 as it is been before so how/where i can find the Attack command( yellow sword ) to put it back ??

Thanks ..

F6 is your key bound attack button. F8 chooses the nearest target to attack.

ok thanks ..