The window on the right contains the future menu where you can add other .asm .INC or .MAC file and have a multiple compilation of multiple files at once.

This will give way to insert libraries written earlier, and add it to any source that we are writing.

In the box at the bottom instead, JNASM reports compiler NASM and link.exe, compiler errors back the number of the error and the line that generated.

Of course JNasm v1.0 shows the text cursor directly on the line of the error by highlighting it with a yellow band.