The command "Render Template" allow to copy a template (from the open editor) to a new editor, asking the variable to replace.
By default, the variable must be like {{VarName}} (to match the regular expression {{[a-z0-9]+}}).
This regular expression can be change by the settings.
To use it :
Open the template editor.
Run the command "Render Template".
Set the value of each variable that VSCode ask.
A new editor appear with the remplaced text.
Extension Settings
This extension contributes the following settings:
tinyTemplating.variableSelector: The RegExp to select variables in the template.