ul>
<li><p>My playback is too slow.  How can I improve it?</p>
<p>Check that you have:</p>
<blockquote>
<div><ul>
<li><p>Help-&gt;About</p>
<ul>
<li><p>Go to the HW tab.</p>
<p>Check the GPU information and make sure that Vendor/Renderer is not
Mesa, but the appropriate for your graphics card.  For example:</p>
<p>Vendor:     NVIDIA Corporation
Renderer:   NVIDIA GeForce RTX 3080/PCIe/SSE2
Version:    4.6.0 NVIDIA 535.171.04</p>
<p>Max. Texture Size:32768 x 32768</p>
<p>If it is using Mesa, you may need to 