El botón 1 le permite restaurar todas las preferencias a sus valores por defecto, como cuando instaló BlueBrick por primera vez. El botón 2 le permite restaurar sólo las preferencias mostradas en la categoría visible actual.
Hay varias configuraciones de ratón 3. La opción de centrado de zoom está seleccionada por defecto y permite hacer zoom allí donde se encuentra el puntero del ratón. Desactivar esta opción hará que el zoom sea relativo al centro de la pantalla. La velocidad de zoom se puede cambiar ajustando la sensibilidad de la rueda. Cuanto mayor el número, más rápido el zoom. Moreover you can choose which modifier key (among CTRL, ALT and SHIFT) should be used to pan the view, select several parts or duplicate them in combination with the left mouse button.
When you Copy/Paste 4 some parts on your map, you can decide to add an offset in order to distinguish the copied parts from the original ones (otherwise they will be pasted at the exact same position). However when you want to move some parts from a layer to another one, usually, you don't want them to be off-setted. So the combobox let you choose when the offset should be added: either never if you don't like the offset feature at all, always, or only if you paste on the same layer.
At the top of the Rulers frame 5, you can configure the ruler attach point size in pixel. Be aware that if you choose a too small value, you will have difficulties to grab the attach points or click on them. Just under there is a checkbox to let you choose if you want BlueBrick to switch to the ruler edition tool after each Ruler creation, which is the default behavior. However, if you prefer to change your Ruler tool manually, or if you plan to create a big series of Ruler in a row, you can uncheck that option.
In this preference page, you can also configure the default ruler appearance 5 i.e. the appearance of each new ruler created. However, note that this is not the easiest way to do it. A much easier way is to right click on a ruler that you like in your map, and choose the menu Use as Template in the contextual menu. It will automatically set almost all the settings of this "Ruler" frame. Read the Using Rulers section for a complete description of those settings (except for the first two ones, please read above).