C. Change name of variable

<p>Because changing of variable names has an effect on the whole program, it is possible only in this working step. To do this put the cursor of the keyboard to the respective line and overwrite the previous variable name with the help of the key BACKSPACE or DELETE.</p>

<p>By leaving the variable set you have to confirm the changes that are now saved automatically in the relational databank for all of the following working steps.</p>