How does a designer work with ready-made themes for websites?

Question

Design

More than once I have already faced a simple task: we are making a website, we decide to use a ready-made theme (for example, with themeforst) to save resources. All the same, the question arises of involving a designer - the elements on the page should be correctly positioned, the sizes of the blocks should be selected, it is possible to change the colors.

spoiler

Ну и с заказчиком в конце концов поговорить, кто-то же должен

Every time dancing with a tambourine. So far, we have used two options:
1) work with the theme in the code right away
2) take a screenshot, cut out elements from it and drag it around the page in Photoshop :)
Both are not very good.
It is difficult to experiment in the first approach, yet the code takes a long time to edit compared to dragging blocks around the page. No matter how good and convenient the theme may be.
In the second option, the layout is ugly, and therefore not representative.
Is there any approach/utility that reduces the pain of working with ready-made website themes?

Answer 1

In general, responsible theme manufacturers provide, among other things, psd files with theme designs.
If you were not given these files during the purchase - do not be shy, write to the manufacturer on themeforest, on the site, on soap, send a text message to the phone number indicated on the site, etc. - in short, shake.
If here without success, then for good, it would be necessary to independently recreate the design, and not with pieces of screenshots, but a well-tuned source code. How else? Otherwise, it remains only to front-end right away, and this is really not productive.