Cfrgtkky

My environment is as follows:
OS: Windows 10 Pro: 64bit kept being updated.
WinEdt: Build: 20180507 (v. 10.3) - 64-bit
Okulat: 1.6.70 32-bit
Very sorry, I should have mentioned it.

WinEdt is an excellent Editor for lattexing; I usually use PDFTexfy and preview with Sumatra. SumatraPDF is also nice; it works lightly. But, I am aged and has become quite weak in eyes.
For me, the font in SumatraPDF preview looks quite thin and get tired soon.
Or must magnify extremely te preview.
Adobe Acrobat 11 Pro shows better view, but as I understand synchtex is not supported.
The PDF font in Oklar preview (on windows 10) appears quite good and, with anti-aliasing switch (for both font and graphics) on, the preview is almost ideal for me.
This is the reason I desire the enveronment WinEdt+Okular.

I note that both inverse and forward search with TeXStudio+Okular configuration
works fine. The setting is, for your reference,
(a) forward search;
In TeXStudio
External Editor: okular --unique "file:?am.pdf#src:@ ?c:am.tex"
(b) Inverse Search
In TeX Studio
Command table: PDFLaTeX: pdflatex.exe -synctex=1 -interaction=nonstopmode %.tex
Command table: External Editor: okular --unique %.dvi#src:@?c:m.tex
In Okulkar
[Settings]-[Configure Okular...]-[Editor]
Custom Text
Editor Command: texstudio "%f" -line %l

This works.

The description below
But, I prefer WinEdt to TexStudio from my personal history.
Besides, I cannot switch on the Okular's the antialising under this preview mode.

I tried in Okular replacing
texstudio "%f" -line %l
by
(1) "C:Program FilesWinEdt TeamWinEdt 10WinEdt.exe" "[Open(|%f|);SelPar(%l,10);]"
(2) "C:Program FilesWinEdt TeamWinEdt 10WinEdt.exe" "%f" -line %l
but, both did not work.
In WinEdt, I used PDFTeXfy with PDFLaTex + synch tex. synch=+1 -1 both tried.
The Tex studio command line contains .dvi. Is this the cause of my failure in WinEdt?
Should i use dviout somwhere?

Slight questionable thing is that, not only getting failure (nothing occurs at mouse click)
at (1) or (2), but also the texstudio setting "%f" -line %l seems remaining somewher in PC
even though (1) or (2) is written in the command line,
because I can still work Inverse searching with TeXStudio+Okular configuration.

If an expert help me, and devise WinEdt + Okular setteing, I would be most grateful.
Perhaps it will help also old people greatly. Thanking in advance.

There should be no difference in readability of a PDF when previewed in a Viewer at the same zoom size. Here the same document is open in the same screen in both SumatraPDF and Okular

The Reverse search command for both viewers should be similar. The last number is your choice of colour (8 is turquoise whilst 10 is blue) so you can use either. Some users prefer SelLine in place of the SelPar and it may be easier to use ' in place of the vertical bar symbol |

"C:Program FilesWinEdt TeamWinEdt 10WinEdt.exe" "[Open(|%f|);SelPar(%l,8)]"

"C:Program FilesWinEdt TeamWinEdt 10WinEdt.exe" "[Open('%f');SelLine(%l,10)]"

On some occasions WinEdt 103 configures an additional Application Caption identifier command -C="WinEdt 10.3" so you may eventually use a final command of

"C:Program FilesWinEdt TeamWinEdt 10WinEdt.exe" -C="WinEdt 10.3" "[Open('%f');SelLine(%l,10)]"

It should work instantly in any .pdf that has a valid .synctex(.gz) and .tex file so a double left click in SumatraPDF or Shift & left click in Okular will open WinEdt with the .tex file at the correct position.

In WinEdt the command to preview the pdf is F8 and will open whichever PDF viewer is set in Options > Execution Modes > PDF Viewer and WinEdt has an automatic configurator that works very well with its preferred viewer SumatraPDF.