When using 010 Editor v4.0 or beyond, by default any line longer than 8096 bytes will be split into multiple lines. Any line that is displayed in the editor as a result of splitting a long line will be marked with '-' in the address area of the editor. The maximum line length can be set with the options dialog by clicking 'Tools > Options', going to the 'Text Editor' section and entering a new Maximum Line Length. Note that entering an extremely long length in the options dialog may cause slow rendering issues on some machines.