There are 3 ways to change data into a table.

First option: From Maintenance View (SM30)

The easiest way:

But in order for this to work the table should have a maintenance view.

First option: By activating debugger on SE16N (right before you execute the query)

In case the table doesn't have any view, we can go with the alternative way of debugger.

We go to SE16N and we activate the debugger by writing on command line the /H

After that we change these 2 variables "GD-SAPEDIT" and "GD-EDIT":

From empty to 'X'.

After that we press F8 or Continue button

And now we can insert/delete/update a row of the table.

First option: From a standard FM.

There is a standard FM "SE16N_INTERFACE" that can make above step automatically.

We go to SE37, we write the FM name and we press execute or F8.

When we run the FM we populate the name of the table -> I_TAB (name), the edit -> I_EDIT (X) and the sap edit -> I_SAPEDIT (X)

After we click on execute or F8.

And now the table can be edited.