remove your SD card (this message applies to both SD cards) and once you press **Y** on the prompt, *NextZXOS* will perform the **REMOUNT** command as discussed earlier, thus remounting any physical drives you've unmounted. ### Configuring the Browser File and drive management operations with the *Browser* is one facet of what it can do. The most important function it has however is to recognise and launch files of various types when we highlight them and press **ENTER** (or **SYMBOL SHIFT + ENTER** – *see immediately below*). It's able to do so due to its extensible nature using a simple, specially formed text file called **browser.cfg** that's located under **c:/nextzxos/**. The *Browser* also offers a way to assign TWO types of launching for a *filetype*. This is accomplished by adding two lines in **browser.cfg**. For example we could **LOAD** a **.bas** file or convert it to plain text using the **.bas2txt** *dot command*. The first action would be launched by **ENTER** and the second one with **SYMBOL SHIFT + ENTER** Each line of **browser.cfg** contains information formed in the following fashion: *TYPE LINE* where *TYPE* is a 3 letter file type (e.g. **BAS**) followed by *LINE* which is a sequence of *NextBASIC* commands separated by colon characters as per usual but prefixed with one of the following symbols: | Prefix | Meaning | | --- | --- | | : | Return to *Menu* afterwards | | < | Return to *Browser* afterwards | | ; | Return to *NextBASIC* afterwards | The *NextBASIC* commands that follow, use the following placeholders: | Character | Meaning | | --- | --- | | \| | Is replaced by the short *filename* as read by the *Browser*[^p196-18] | | "\| | Is replaced by the long *filename* as read by the *Browser* and must be terminated by a matching quote (") | | £ | Is replaced by *language code* (ie. **en** for English, **es** for Spanish etc) | Additionally, if a quote character is needed inside the *NextBASIC* command sequence, it can be *escaped* using the backwards slash character as follows \". *Wildcards* can be used to replace parts of a file *type* (**\*** for the remainder, **?** for only one character) **Browser.cfg** can be edited using any standard text editor. More information about the Browser and how to configure it can be found by launching its *guide* file with: ``` .guide browser ``` ### The Command Line The *NextBASIC editor* is excellent for editing large programs, however for single use commands like the ones for file management or the *dot commands* we have been examining on a case-by-case basis, it can be a bit cumbersome to use, especially since the underlying *NextBASIC* listing will appear after every direct command. For that reason, *NextZXOS* includes a special version of the *NextBASIC editor*, that hides (but does not erase) any *NextBASIC* program that you may be editing and offers an uncluttered view of the screen making it easier to enter commands directly to the operating system. Unlike other operating systems, the *NextZXOS* command line still gives full access to *NextBASIC* and doesn't include a prompt like the one available on *CP/M* which we'll examine a bit further. To access the *Command Line* interface, press **EDIT** to bring up the *NextZXOS menu*, select *Command Line* and press **ENTER**. While in the *Command Line* interface you have the op- [^p196-18]: *This functionality is recommended with dot commands that cannot deal with LFNs.*