How to set/adjust editor tabs to default view?

I am using MATLAB for long time but since Last few days i am facing an issue that when in my editor i want to open a new tab ,new tab open up in a new editor window and old/previous tab is no more visible

But my desired scenario is shown attached snapshot,where current tab(Untitled2) and previous tab(Untitled) both are visible. I have also written Desired at top with help of paint

How can i achieve my desired scenario?

Answer 1

[Steven Lord]

In the upper-right corner of the "new editor window" (the undocked document) there should be a small circle containing a downward-pointing triangle. Click that triangle and select one of the two options that start with the word Dock -- one docks just that document, one docks all the undocked documents.

If you click that same triangle for a docked document, it will let you undock the Editor or individual documents into separate windows. You can also click and drag a document's tab out of the Editor to undock it, which is probably how the first undocked document became undocked.