The way to achieve this is to set the ScaleFactor
property of RadRichTextBox:
or in code-behind:
However, there is a bug in RadRichTextBoxStatusBar that causes status bar's combo box to show incorrect value when value of 75% is used (the value is applied to RadRichTextBox properly). It should be fixed in one the following LIBs (Latest Internal Builds). As a temporary workaround you could use any other value different from 75%.
Don't hesitate to contact us if you have other questions or if this doesn't fit your needs.
the Telerik team
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