If the data you want to enter in some range of cells is very regular, such as education (primary, secondary, high school, secondary, college, undergraduate, master, doctor), title (technician, assistant engineer, engineers, senior engineer), and so on, you want to reduce the workload of manual entry, then we can set the Drop-down list implementation Select input. The specific methods are:
Select the range of cells that you want to set the Drop-down list for, click data → effectivity, and choose the Settings tab from the Data Validation dialog box.
Select sequence in the Allow Drop-down list;
In the Source box, enter the sequence of data we need to set up the Drop-down list, such as "technician, assistant engineer, engineers, senior engineer", and make sure that the checkbox "provide a drop-down arrow" is selected, click "OK" button.
This allows you to quickly enter data by clicking the Drop-down arrow on the right side of the cell to select the input data.