Add on .. if you have an AMD graphic card: From another thread/Adobe support: Could you please try the following and report back if it solves the issue. == Try this workaround to see if it works for you. If not, delete the config.lua file afterwards. Choose Edit > Preferences. In the Preferences dialog, go the Presets tab. In the Presets tab, click the Show Lightroom Presets Folder button. The root preset folder opens in the File Explorer. In the File Explorer, navigate into the Lightroom folder. Go to the link https://adobe.ly/2hUHGYa and download the config.lua file. Copy the downloaded config.lua file into the Lightroom folder mentioned in the previous step. Relaunch Lightroom Classic CC. The System Info dialog (Help > System Info) should display the config.lua flags entry as shown below: Config.lua-Flags: AgView.disableDirect2D = true == Thanks, Sunil
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