# View/Edit Database Tables 

To view/edit database a table, select the table in database menu.
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<img alt="Database Menu" src="images/database_tables/database_menu.png" width="250" />
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## Plot Types Table

List all types of plotting and description. This table is readonly.
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<img alt="Plot Types Table" src="images/database_tables/plot_types.png" width="590" />
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+ Fields' meaning:
    + Plot Type: Name of the plotting type
    + Description: Describing how the channel will look like and the format of the ValueColors if applicable.
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## Parameters Table

List all parameters available.
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<img alt="Parameters Table" src="images/database_tables/parameters.png" width="590" />
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+ Depend on the PlotType entered, ValueColors will be applied for the parameter or not. If ValueColors is available, there will be some hint for values to entered in grey color.
+ To add a new row to the table, click on ADD ROW button.
+ To save any changes to database, click on SAVE CHANGES. If ValueColors isn't applicable, the field will be cleared; otherwise it will be validated at this point.
+ To close the dialog, click on CLOSE. User will be asked to confirm closing if there have been any changes made.
+ Fields' meaning:
    + No.: Line number, start with 0.
    + Param: Parameter's name.
    + Plot Type: Define how to plot the parameter. Description of Plot Type can be found in Plot Types Table.
    + ValueColors: mapping between values and colors or dot/line and color, or simply color of dots in the plots
    + Height: Height of plot in compare with other plots.
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## Data Types Table

List all data types available in which Default is the datatype for DEFAULT channel to draw any channels that aren't defined in database.
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<img alt="Data Types Table" src="images/database_tables/data_types.png" width="590" />
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+ To add a new row to the table, click on ADD ROW button.
+ To save any changes to database, click on SAVE CHANGES.
+ To close the dialog, click on CLOSE. User will be asked to confirm closing if there have been any changes made.
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## Channels Table

List all channels available for the selected Data Type on the left-top corner.
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<img alt="A Row of SOH List" src="images/database_tables/channels.png" width="590" />
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+ To add a new row to the table, click on ADD ROW button.
+ To save any changes to database, click on SAVE CHANGES.
+ To close the dialog, click on CLOSE. User will be asked to confirm closing if there have been any changes made.
+ Fields' meaning:
    + No.: Line number, start with 0.
    + Channel: Channel's name.
    + Label: Displayed with the channel to explain the meaning of the channel.
    + Param: To describe what kind of parameter the channel is. How the channel is plotted depends on this field.
    + ConvertFactor: To convert from value read to actual display.
    + Unit: The unit of the displayed value for the channel.
    + FixPoint: Decimal point to display the value.
+ Channels that aren't defined in database will be draw with DEFAULT channel defined in Data Type Default.
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<img alt="DEFAULT channel" src="images/database_tables/default_channel.png" width="590" />
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