Shortcut key issues about iosender HOT 3 OPEN

Yes.
A-axis is controlled by <ctrl>+<shift>+U and N, Z by <ctrl>+<shift>+I and M or <PgUp> and <PgDn>.
Save out a keymapping file from the Settings: App tab and modify it if you want to change any mappings.

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是的。 A 轴由 ++U 和 N 控制，Z 由 ++ I 和 M 或 和 控制。从_“设置：应用_”选项卡中保存键盘映射文件，如果要更改任何映射，请对其进行修改。

My computer has two keyboards, why is it that one of them cannot achieve multi key functions such as stopping, starting, resetting, unlocking, and resetting, while the A-axis can be tapped

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Not sure I understand the question...
Anyway, see this discussion for how you can log kepresses to the console, perhaps that will help?

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