When starting KXStitch you will be presented with a blank canvas of the default size. This is also the case when selecting → . The default sizes can be set in the pattern properties dialog by enabling the set as default checkbox.
If the default size is not suitable for your planned pattern, you can use the → dialog to change it. Adjust the values as required and after clicking on , the pattern will be resized to suit.
Before creating a pattern you will need to add some flosses to the palette using the → . This will enable the tools in the menu and toolbar. See the Palette Manager Dialog for further information.