Automatically Reopen Previous Model When Started - check this if you want the model you previously worked on to be automatically reopened when you start MySQL Workbench.

Place Sidebar on the Right Side - by default the Sidebar is placed on the left-hand side of the MySQL Workbench application. Select this option to place it on the right-hand side.

Force use of software rendering for EER diagrams - MySQL Workbench will use OpenGL for rendering when available. However, due to faulty drivers, problems do occasionally occur. These issues can be resolved by selecting the software rendering option here.

Undo History Size - you can limit the size of the undo history here. Set this value to 0 to have an unlimited undo history.

Auto-save model interval - An open model that has not been saved will automatically be saved after this period. On loading a model file, MySQL Workbench will notify the user if the file was not previously saved correctly, due to a crash or power failure. MySQL Workbench can then attempt to recover the last auto-saved version. Note that for automatic recovery to be available for a new file, it will have to have been saved at least once by the user.

Interactive GRT Shell Language - you can select the language to be used in the GRT shell by chosing a language from the drop down listbox Interactive GRT Shell Language. Currently there is a choice between Lua and Python. Python is the recommended option.