When typing in a number, or editing one, the <#296#>Backspace<#296#>,
<#297#>Delete<#297#>
and the <#298#>Left<#298#> and <#299#>Right<#299#> arrow keys can be used in the usual
manner. The default editing mode is always the ``Insert'' mode,
but it can be toggled to the ``Overwrite'' mode with the Insert
key. <#300#>Ctrl + Left<#300#> or <#301#>Right<#301#> arrows will move the cursor to the end
or beginning of the number being edited.