This group of preferences - General Preferences - include all the preferences concerning the look and feel of LyciaStudio, e.g., perspectives, views, editors, and keys:

Includes the following pages and groups of pages:

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allows changing default behavior of LyciaStudio |
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Appearance |
allows specifying the look and layout of views in LyciaStudio |
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Compare/Patch |
allows managing how LyciaStudio performs compare, merge, and patch |
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allows managing files association and default encoding for different types of content |
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Editors |
allows managing code editors within LyciaStudio |
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allows specifying locale extensions and layout direction for LyciaStudio |
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Keys |
allows customizing the keyboard functions |
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allows enabling notifications for different event types |
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allows managing available perspectives |
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Search |
allows managing how search is performed in LyciaStudio |
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Security |
allows specifying settings of the encrypted storage systems |
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Startup and Shutdown |
allows managing LyciaStudio behavior on startup and shutdown |
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allows modifying plug-in tracing |
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allows specifying the default browser that will be used to run applications |
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Workspace |
allows managing Lycia-specific properties of workspaces |
In the General page, you can change the following settings of LyciaStudio:
→ specify whether time-consuming operations will be performed in the background:

if yes (= checked), then such operations will run in background, and a 4gl developer will be able to perform other tasks;
if no (= unchecked), then such operations will run under the direct control of a Lycia user, and he/she will not be able to perform other tasks.
→ specify whether to keep the perspective/view/editor dialog open after calling them with a key combination:

if yes (= checked), then the dialog will close as soon as the key combination is released and the highlighted option is activated;
if no (= unchecked), then the dialog will be still open after the key combination is released and the highlighted option is activated.
You can use Ctrl + F7 to open views and Ctrl + F8 to open perspectives:
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→ specify whether to display the current Java heap status or not:

if yes (= checked), then an indicator will appear at the bottom line of LyciaStudio showing the current Java heap status:

→ specify the save interval for the workbench (in minutes):

→ specify how the resources will be opened:

Double click - the resource will be selected by a single clicking and opened in the editor by a double clicking;
Single click + Select on hover - the resource will be selected at the mouse hovering over it and opened in the editor by a single clicking;
Single click + Open when using arrow keys - the resource will be selected and opened in the editor by the arrow keys.
Resulting behavior depends on a resource and can be different for different resources.
For more details, please, refer to the original Eclipse documentation here.
Related articles:
Run/Debug preferences
Team preferences