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RSET (see Chapter 4)
Use
RSET is used tx assign to a string-general-variable without changing the length of the
string it holds.
Syntax
RSET string-general-variable string-expression
RT (see Chapter 12)
Use RT changes the current heading. (See also RIGHT, LEFT and LT.)
Syntax RT [I/stream-number, I angle-change
where angle-changeis a numeric-expression.

RTRIM$ (see Chapter 4)
Use RTRIMS is afunction tx remove trailing spaces from strings.
Syntax
RTRlMSlargumentl
where argumentis a string-expression

RUN (see User Guide Chapter 1)
Use RUN starts executing the current program.
Syntax
RUN
SCREEN (see Chapter 9)
Use SCREEN sets the type and size of a Virtual Screen
Syntax
SCREEN [I/stream-number [if GRAPHICS [size) if,) window-altribute)...
SCREEN [I/stream-number [if TEXT [size) if,) window-attribute)...
SCREEN [I/stream-number [‘if TEXT FLEXIBLE if,) window-attribute)...
where sizeiswidth [FIXED), heighl [FIXED)
window-attribute
is: MAXIMUM width, height
or: MINIMUM width, height or: UNIT width, height or: INFORMATION truth-vafue
widthand height are integer-expressions, giving positive, non-zero values.
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