Can't preview with Ctrl + K V & Ctrl + Shift + V if other markdown viewers are installed

[tats-u]

Markdown viewers like https://github.com/shd101wyy/markdown-preview-enhanced replacing the default viewer also take over keyboard shortcuts Ctrl+K V & Ctrl+Shift+V, which is used for opening them. 3rd-party viewers prevents us from previewing slides using the default viewer and this extension.

To reproduction:

1. Install this extension and Markdown Preview Enhanced.
2. Create new slide written Marp-flavored Markdown
3. Preview by pressing Ctrl+K V
4. Markdown Preview Enhanced appears and slide preview doesn't.

[yhatt]

The default preview is not be overridden even if you installed a third-party extension. Thus, you can still open the Marp preview. Try either of the following:

• Use "Markdown: Open Preview" and "Markdown: Open preview to the Side" command directly from command palette. (Ctrl+Shift+P)
• Change conflicted keybinding in keyboard shortcuts editor.

It isn't an issue caused by marp-vscode.