I believe that the default is the first item in the list that you put as values. You can have that be blank by starting the list with a semicolon.
But your macro code should then trap the situation where this is empty; ie. with something like:
If you have a favorite filter saved with some name then you can also set the selection with the macro with $Choosefilter="..." (replacing the ... with your filter name). In case you have not found the help text for this, see the help for Form() and click through the links for Forms controls and particularly Combobox.
For saving settings in macros, see this link about MacSettings
GSK |
$Form=EditForm($Form,"Choosefilter","Values",";"+sysinfo("Filters")) |
GSK |
If $Choosefilter="" |
If you have a favorite filter saved with some name then you can also set the selection with the macro with $Choosefilter="..." (replacing the ... with your filter name). In case you have not found the help text for this, see the help for Form() and click through the links for Forms controls and particularly Combobox.
For saving settings in macros, see this link about MacSettings