From your comments:
It is a big understatement when I say typesetting problems. They don't understand alphabets have different glyphs, and that figure size in the paper is not the same as the BB sizes (I was using LaTeX), and they don't know how to make a table with cell shadings (not for cosmetic purpose, but for highlighting some entries). They don't know how to typeset a multi-line equation correctly.
Elsevier provides some really good support for LaTeX users. The elsarticle class is pretty nice and they have some good documentation. While they allow any package in TeXLive and custom user macros, their instructions say:
- Use the standard layout or keep layout changes to a minimum. (Custom layout will be removed.)
Use the standard layout or keep layout changes to a minimum. (Custom layout will be removed.)
- Keep it simple. (Advanced constructions with for example TikZ or pstricks will be rendered as images.)
Keep it simple. (Advanced constructions with for example TikZ or pstricks will be rendered as images.)
Looking at what seem to be your issues
They don't understand alphabets have different glyphs
Fonts in LaTeX are a pain. Not every "font" supplies every glyph in every typeface. If you are using a font like Computer Modern or Latin Modern, you should hopefully be okay. As you do more advanced things (and changing the font is "more advanced") you violate the keep it simple instruction. Ideally, only use fonts/glyphs that you have either seen in other articles in that journal or are explicitly mentioned in the author instructions. If the journal has done it before, tell/show the editor the example. If it is something you have not seen before tell the editor something along the lines of it appears that in your system these two glyphs [tell them the glyphs] do not look that different, what can we do to make it easier for the reader.
figure size in the paper is not the same as the BB sizes
The instructions are clear about how wide the columns are in the journal layout. Bounding boxes are a real pain and not every program outputs images with reasonable bounding boxes. Ideally your bounding box should be tight to the figure content and exactly the same size as the column width. If your bounding box is not the same size as the column width and/or tight to the figure content, the editor/typesetter needs to make a choice. Again politely explaining why the image needs to be exactly the desired size (although it is not clear to me why this would be true), would be helpful.
they don't know how to make a table with cell shadings (not for cosmetic purpose, but for highlighting some entries).
Shaded cells in tables definitely violates the keep it simple instruction. Most style guides I have seen use footnotes in cells to highlight them. This obviously changes the content of the article. You should make sure that elements of your table match things that you have seen in other articles in the journal.
They don't know how to typeset a multi-line equation correctly.
They have some rules, but breaking equations is difficult. Since you know the column width, you can/should put the line breaks in manually.