# Song fillbar Song fillbar is located just above the [*main editor*](/karedi/user-interface/middle-components/main-editor.md)*.* It visualizes how all lines of the song from all tracks are distributed over the audio file and lets you quickly change the range of beats visible in the main editor.
## Understanding the fillbar The width of the fillbar corresponds to the song's duration. Left end represents the beginning of the audio and the right end represents the end. Each line is represented on the fillbar by a rectangle in the track's color.
In this case we have less than half of the song done (since the right half of the fillbar is almost empty). The song begins with 8 lines of the blue track, later we can see that the singer switches to the red track's one (with occasional background singing from green track singer) and once red track's singer finishes their part, blue track's singer starts singing again. We can also see that there are some lines sung by a yellow track's singer later in the song. ## Fillbar vs visible area The range of beats that is visible in the main editor is represented in the fillbar by the black border. ![](/files/Y5Z0I9rBOI2sInnuAX95) ### Adjusting the visible area to some line If you click somewhere in the fillbar on an active tracks' line representation (in this case the blue track is active so just click on some other blue rectangle) you will be transported to that line in the main editor:
### Moving the visible area By clicking somewhere else on the fillbar (in a place that does not have any lines on the current track) you will move the visible area to that part of the song. The range of beats visible in the main editor will change:
The number of the visible beats will stay the same. You will just be transported to some other part of the song. ### Increasing/decreasing the visible area You can also use the fillbar to decrease or increase the number of beats visible in the main editor. If you hover your mouse on the right or left side of the black border representing the visible area in the fillbar you will see that the cursor changes to <-> indicating that the side can be dragged. Dragging the side will resize the black border and as a result change the visible beat range. Try it out. ## Purpose of the fillbar The fillbar lets you: 1. Quickly notice any gaps in your song\ In our example we can easily see that there is way too much empty space in the later half of the song meaning that there is some part of the song that is not yet mapped. 2. Quickly move around in the song\ Without the fillbar on an empty song you would have to scroll to the place that you want to see which would take much more time than simply clicking once in the desired place. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://karedi.gitbook.io/karedi/user-interface/middle-components/song-fillbar.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.