Selecting Settings-> Configure Kspread... opens a dialog box with several pages, selected with the icons at the left of the dialog box, which allow you to change many aspects of KSpread's operation.
This page has a number of checkboxes which control how items are displayed, entered or calculated:
If this box is checked KSpread will display the actual formulae in cells rather than the results.
If this box is checked KSpread will display a small blue triangle at the bottom left corner of cells containing formulae.
Controls whether or not the sheet grid lines are shown.
If this box is checked the column headings will show as numbers rather than as letters.
If this box is checked the cell reference shown at the left end of the Formula Bar will be displayed in LC mode (i.e. L2C3) rather than in its normal form B3. This does not seem to be of much use at the moment.
Controls whether formulae are recalculated automatically when the value of any cell they refer to changes.
If this box is checked any cell containing the value zero will appear blank.
Check this box and the first letter of any text you type in will automatically be converted to upper case.