Describe the feature and the current behavior/state

Left to the linenumbers of the document is an area where a click creates a bookmark. But with documents with thousands of lines it is not quite clear where this area is. Images show the same document. I tried to depict the area with read lines:

In the case above about 50% of the area between center bar and line numbers can't be clicked for bookmarks. Moving the pointer as close as possible to the center tool may end up in clicking a tool instead of creating a bookmark. So creating the bookmark is more strenuous.

Maybe you could make this area more visible in some way, for example with the two lines. Or the columns for bookmarks and line numbers could be interchanged (s. notepad++). Thus both columns would always stay a constant distance from the text area away.

Who will benefit with this feature?

People using line numbers and bookmarks for large documents.