Opens an existing file. A file dialog appears, where you select an existing file. If the selected file is a project file (*.spp), then the currently open project and all open tabs will first be closed as with the Close All command, and then the selected project is opened. If the selected file is a schematic file (*.sps), then the schematic will be opened for editing under a new tab in the tab area.
It should be noticed that when opening a schematic, it is not added to the project. As a consequence, if the schematic was not in the project before, then it is not possible to compile the schematic into a block for use in other schematics. To use a block that a schematic file defines, the file must be added to the project using the Add Files... command.
Also notice that when opening a schematic that itself uses blocks that are not in the project, then these block instances and the connections to them will be removed in the schematic editor. When this happens, warning messaged will be written to the message view. Study the warning messages to find out what blocks are missing and add the missing blocks to the project using the Add Files... command. Then close the failing schematic file without saving the changes and open it again.
Ctrl-O
Always available.