Problem with cell editing

Problem with cell editing

I have a problem with cell editing - lets say I typed a word into a cell but then need to make an addition - the cell will only show me the first word i typed in the cell (and the addition will appear in the "insert function" line above my spreadsheet)??? Also I don't seem to then be able to delete the original word i typed in. 

This is annoying as I need to see complete content of cell as typed in and not ONLY when I click the cell!

Also, where is the "wrap text" cell function?  Thank you. B