Is is possible to avoid formatting in Markdown Editing

Support
2

While it's possible, it currently requires custom CSS to remove formatting.

For example,

userchrome.css 
/* Unstyle headers */
.cm-editor .cm-headerLine {
  font-size: inherit;
  font-weight: inherit;
}

/* Unstyle bold */
.cm-editor .tok-strong {
  font-weight: inherit;
}

/* Unstyle italic */
.cm-editor .tok-emphasis {
  font-style: inherit;
}

/* Unstyle links */
.cm-editor .tok-link {
  color: inherit;
  opacity: inherit;
}

/* Unfade URLs */
.cm-editor .tok-link.tok-url {
  opacity: inherit;
}

/* Unstyle code blocks and inline code */
.cm-editor .cm-line.cm-codeBlock,
.cm-editor .cm-inlineCode {
  background-color: unset;
  border: unset;
  
  /* Makes code blocks use the same font as other content */
  font-family: inherit;
}