Hello 문병진 Byungjin Moon,
Please note that inline mode vs. display mode (for LaTeX) and inline mode vs. block mode (for Confluence macros) are two different things.
Although you can choose to render your LaTeX equation in inline mode, it is, unfortunately, not possible to do this for the macro itself. Currently, this is a limitation of Atlassian’s “Forge” platform on which the plugin is written. The module for Confluence macros currently only allows this for macros that use server-side rendering. Unfortunately, the functionality of LaTeX for Confluence requires client-side rendering.
There is an open ticket at Atlassian to enable this feature, but, unfortunately, it is currently marked for future consideration.
Best,
Bertly