When switching between the Code and Visual editors, your code may be modified to optimize drag-and-drop features. This includes switching character entities to the characters they represent.
It is recommended that you save your work before switching to the Visual Editor. That way, if any unwanted changes are applied to your code, you can still recover the original version. Additionally, you can run a search for undocumented characters and replace them with the proper entities by switching to the Code Editor and selecting Tools > Search for Undocumented Characters.
Note: If you want to preview your design, use the split-screen preview or Preview tab instead of the Visual Editor, since these options will not make any modifications to your code. Additionally, we recommend using either the Code Editor or the Visual Editor, but not of a combination of both.