The Data Editor has many enhancements in Stata 18:
Pinnable rows and columns. Pinned rows or columns do not scroll with the rest of the data so they will stay in view as you scroll through the data. This is useful for doing visual comparisons with some other data that might be visible only as you scroll. An ID variable would be a natural thing to pin.
Resizable cell editor for string data. When you edit string variables, the cell editor can be resized so that more of the string is visible while editing without it scrolling out of view of the cell editor.
Tooltips for truncated text. Any cell value that is too wide to fit within its cell's column width is truncated to fit. Hovering the mouse pointer over a cell with truncated text will display a tooltip with the cell's value without truncation.
Proportional-width font support. The Data Editor now supports proportional-width fonts. This improves readability of the data and allows more variables to be displayed at a time without requiring scrolling. A monospaced font can still be used if preferred.
Show variable labels in column header. Variable labels can now be displayed in the column headers right below their variable names. This can be very useful for viewing datasets with short and nondescriptive variable names that have variable labels.
New keyboard shortcut for hiding or showing value labels. Quickly toggle between viewing numeric values and their corresponding labels.