Changing properties of long text box
I would like to change the properties of a long text box (Shop -> Items in Shopping Cart -> Item Details -> Document and Attachments -> Texts). I found out that I have to edit <b>SAP_TemplateControlLayerBegin</b> in template <b>templatelibrarydynpro.html</b>.
But how do I edit this template? Can I do it inside of SAP? Which is the correct transaction to do that? Or do I need another tool?