i want get the proportion of the viewport for a text field. but i can't find it ? or it can do with diesel or lsp>\i want the text auto update.

The proportion of the viewport?  Are you referring to the viewport scale?

i just want create a field, this field can auto update, the date come from viewport standard ratio.when i change the viewport standard ratio,then the field can auto update with "ctrl+s"

Sorry but I don't understand the significance of your request.