![自定义通知中心外观](https://linux22.com/image/937092/%E8%87%AA%E5%AE%9A%E4%B9%89%E9%80%9A%E7%9F%A5%E4%B8%AD%E5%BF%83%E5%A4%96%E8%A7%82.png)
答案1
我没有安装 Ubuntu 20.04。我已经在 gnome-shell 40 中测试过。在您的版本的任何 gnome-shell 主题中。搜索下面的内容并将其编辑为您喜欢的值将带来您想要的更改。
/* Popovers/Menus */
.popup-menu-boxpointer, .candidate-popup-boxpointer {
-arrow-border-radius: 12px;
-arrow-background-color: #353535;
-arrow-border-width: 0px;
-arrow-border-color: #202020;
-arrow-base: 0px; # I have edited this
-arrow-rise: 0px; # I have edited this
-arrow-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.5); }