I am new to LaTeX world.
I have set Texmaker (installed on windows 8.1) to show source editor and embedded pdf viewer on same window.
Now whenever I Press "Run", the embedded PDF viewer window do not show the output PDF.
It only display the output PDF whenever i reopen it by "File>Open Recent".
I have posted a screenshot regarding this,
I deleted the equation in my sample document and saved it and pressed "RUN" but right window did not show the changes made by me.
It is still showing the equation deleted previously.

any help on this?

save a copy of your settings file, then reset and load it again – Uchendu May 04 '22 at 22:21