Yes, you can with SelectEx
<?xml version="1.0"?>
<button backcol="none" display="both" hotkey="shift+F" hotkey_label="yes" textcol="none">
<label>Focus Selection</label>
<icon1>#fullrowselection</icon1>
<function type="normal">
<instruction>SelectEx MAKEVISIBLE=checked</instruction>
</function>
</button>