> For the complete documentation index, see [llms.txt](https://tagviewer.gitbook.io/tagviewer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tagviewer.gitbook.io/tagviewer/configuration-guide/problem-and-solution.md).

# Problem & Solution

Find how to solve your problem, quickly and efficiently.

**Change the width of the sidebars**: UI | [JSON](/tagviewer/configuration-guide/json-configuration.md#navwidth-and-filterswidth)\
**Don't save the size of the sidebars between restarts**: [UI](/tagviewer/configuration-guide/settings.md#save-the-width-of-the-sidebars-between-restarts-boolean) | [JSON](/tagviewer/configuration-guide/json-configuration.md#nosavewidths)\
**Don't offer the previously open TagSpace on the landing page**: [UI](/tagviewer/configuration-guide/settings.md#offer-the-previously-open-tagspace-on-the-landing-page) | [JSON](/tagviewer/configuration-guide/json-configuration.md#offerprevlocation)\
**Automatically reopen the previously open TagSpace when TagViewer starts**: [UI](/tagviewer/configuration-guide/settings.md#automatically-reopen-the-previously-open-tagspace-when-tagviewer-starts) | [JSON](/tagviewer/configuration-guide/json-configuration.md#resumesessiononrestart)\
**Change the default tags and properties for a new TagSpace:** UI | [JSON](/tagviewer/configuration-guide/json-configuration.md#defaulttags)\
**Change how long each item is shown in a slideshow**: [UI](/tagviewer/configuration-guide/settings.md#duration-to-show-each-item-number) | [JSON](/tagviewer/configuration-guide/json-configuration.md#slideshowinterval)\
**Don't stop the slideshow when I exit fullscreen**: [UI](/tagviewer/configuration-guide/settings.md#end-the-slideshow-when-you-exit-fullscreen-boolean) | [JSON](/tagviewer/configuration-guide/json-configuration.md#endslideshowonfsexit)\
**Dark theme?**: UI: click the last button in the top bar | [JSON](/tagviewer/configuration-guide/json-configuration.md#theme)

If an item has no link for UI, it is only configurable in the JSON. Read more about configuring TagViewer in JSON [here](/tagviewer/configuration-guide/json-configuration.md), or about the JSON format itself [here](https://blog.scottlowe.org/2013/11/08/a-non-programmers-introduction-to-json/).