For simple texts use the Text function from the menu item Text on the Start tab. The texts created with this feature keep the DWG size small and the compatibility with other CAD programs high.
We recommend the simple text function for most use cases.
Use the Text Editor to format texts professionally or import formatted texts in common formats. With the Text Editor, you can also insert and edit tables and images. Working with the text editor is reserved for special cases such as adding preformatted marketing texts to your Layout pages. In Layout, texts from the text editor can also be scaled using interactors.