Minitab dialog boxes retain dialog box and sub-dialog box variables and settings you enter during a Minitab session. When you set dialog box options, Minitab remembers the settings until you change them again. This feature lets you be consistent and save time when rerunning graphs and analyses.
For example, suppose you create a simple scatterplot of variables Height and Weight, that was subsetted to exclude even numbered rows. When you next return to it, Height and Weight will still be entered in the main dialog box, and sub-dialog box settings will still specify subsetting by even numbered rows. Or, perhaps you customize the options for displaying descriptive statistics. After additional analysis, you decide to display descriptive statistics again, only this time for a different variable. Minitab remembers your previous settings so that you can generate similar output without having to reset the options.
To re-open the previous dialog box, press Ctrl+E.
If you do not want to use the retained variables and settings from previous efforts, press the F3 key to reset dialog box choices and remove variables. Settings are saved with the project.
To unhide the columns, make the worksheet active, select the visible columns on either side of the hidden columns, then right-click and choose.