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Open YACReaderLibrary on your computer and open the server settings. They show the address, the port and a QR code. In the app, add a server: scan the QR code, or type the address and the port. Your computer and your device must be on the same network.

Check these causes one by one:

• Wrong address or port. Use the current IP address of the computer that runs the server. The address can change if your router does not give the computer a fixed IP. Make sure that no other program uses the same port.
• A firewall blocks the connection. Let YACReaderLibrary accept connections through the firewall of your computer.
• The app has no access to the local network. If iOS or Android asks, allow the app to find and connect to devices on your network. You can change this later in the settings of your device.
• The devices are not on the same network, or the router isolates them. Some Wi-Fi mesh systems, access points and guest networks do not let devices talk to each other.

The apps need a running server to browse your library. Comics that you import to your device are available offline. To keep your library available all the time, run YACReaderLibraryServer on a NAS or a home server. It does not need a desktop, and there is an official Docker image.

Swipe from left to right on a comic or folder in your library. You can delete in the table and grid views.

Swipe with two fingers over the items to select them quickly. Watch this video to see how it works.

Touch and hold a comic or folder to open its context menu.

A library is a folder with comics. Usually you need only one library for all your collections. Click the + button, give the library a name and select its folder (for example C:\Comics). YACReaderLibrary imports all the comics and folders in it. Your files stay where they are.

Put the comics or folders in the folder of your library, then update the library. You can also set YACReaderLibrary to update your libraries automatically.

YACReaderLibrary cannot write its database. Make sure that you can write to the library folder. If your comics are in a network folder mounted with Samba (CIFS), mount it with the nobrl option (some documents call it nolock). Without it, the database cannot lock its files.

Each library keeps its data in a hidden .yacreaderlibrary folder inside the library folder. Move or copy the full library folder, then open it in YACReaderLibrary as an existing library. Your metadata and reading progress stay with it.

Update the drivers of your graphics card first. Then, in the settings, move the performance slider to the left and turn off VSync.

Write in the forum or open an issue on GitHub. Tell us the version of YACReader, your operating system and the steps to reproduce the problem. If a comic file causes the problem, tell us that too.