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Hello users! I like a lot Wysywig 19, but it is a super frustrating experience when I try to edit any template.
The problem is that when I use a template and I want to change a picture or ad 2 instead of one, it does not work, it always floats and moves in the direction where I don't want. Same thing with the layout object in the template. I want to expand it to add more items, mp3 players for example but it does not allow me.
On YouTube, I can find only tutorials that are either too long or useless or such from people that don't speak normal English.
Any help will be highly appreciated!

Usually images can be set on any LayoutGrid columns from the grid properties you can add more columns inside the grid and also add images to those, and you can even drag images directly inside them too. But to be more precise to your solution If you need more help then please provide a demo project so we can see what is not working.

The software supports several different ways to implement web layouts (fixed, floating, flexbox etc).
Most templates use flexible (responsive) layouts, where the size and positions of elements are controlled by grids. So that the layout is adapted auto to the size of the browser.
To add new elements you will also add them to the grid. To change the order of elements you will need to use the arrange tools. Or drag the element from one grid column to another.

It may be helpful to read the tutorial about layout modes to understand the basics of responsive layouts:
https://wysiwygwebbuilder.com/layout_modes.html

If you need further assistance then please provide an example project so we can point you in the right direction.

On YouTube, I can find only tutorials that are either too long or useless or such from people that don't speak normal English.

Apologies if you find the "freely" provided videos by users "useless" and to long. What do you consider "normal" English?.
When you are using a template which uses "Layout" grids you can't just drag'n'drop images or other objects and expect them to fit correctly in position you are required to add extra columns for each object this may include having to add padding etc.
See all of the following tutorials for help on how to use.
An introduction to the Layout Grid - Part 1
https://www.wysiwygwebbuilder.com/layoutgrid_part2.html] An introduction to the Layout Grid - Part 2[/url]
Advanced Layout Grid Features
Layout Grid FAQ