Or, highlight the text, right click the highlighted text and pick "Background Mask". Better yet, us the following macro:
;; Written by: Lee Ambrosius
;; Created on: 4/7/2004
;; This program allows you to add Background Mask to several Mtext objects
;; at one time instead of using the Mtext editor for each object or the Properties Palette.
;; The Properties Palette in 2005 doesn't allow you to set Background Color or Border Offset.
(defun c:mbm ( / kWordBackgroundMaskCurrent dOffsetCurrent ssMtext dxf90 dxf63 dxf45 dxf441)
(prompt "\nApply Mtext Mask")
(if (= kWordBackgroundMask nil)
(setq kWordBackgroundMask "Background" kWordBackgroundMaskCurrent "Background")
(setq kWordBackgroundMaskCurrent kWordBackgroundMask)
)
(initget "None Background Color")
(setq kWordBackgroundMask nil)
(if (= kWordBackgroundMask nil)
(setq kWordBackgroundMask kWordBackgroundMaskCurrent)
)
(cond ((= kWordBackgroundMask "Color")
(if (or (= maskClr nil) (/= (type maskClr) 'LIST))
(setq maskClr (acad_truecolorcli 1))
(if (= (assoc 420 maskClr) nil)
(setq maskClr (acad_truecolorcli (cdr (assoc 62 maskClr))))
(setq maskClr (acad_truecolorcli (assoc 420 maskClr)))
)
)
)
((= kWordBackgroundMask "Background")(setq maskClr 256))
((= kWordBackgroundMask "None")(setq maskClr 0 dOffset 1.0))
)
(if (/= maskClr nil)
(progn
(if (/= kWordBackgroundMask "None")
(progn
(setq dOffsetCurrent dOffset)
(if (= dOffsetCurrent nil)
(setq dOffset 1.0 dOffsetCurrent 1.0)
(setq dOffsetCurrent dOffset)
)
(setq dOffset 1.0)
(if (= dOffset nil)
(setq dOffset dOffsetCurrent)
)
(if (> dOffset 5)(setq dOffset nil))
(if (< dOffset 1)(setq dOffset nil))
(while (= dOffset nil)
(setq dOffset (getreal (strcat "\nSpecify border offset factor: <" (rtos dOffsetCurrent 2 3) ">: ")))
(if (> dOffset 5)(setq dOffset nil))
(if (< dOffset 1)(setq dOffset nil))
)
)
(if (= dOffset nil)
(setq dOffset 1.0)
)
)
(if (setq ssMtext (ssget (list (cons 0 "MTEXT"))))
(progn
(cond ((= kWordBackgroundMask "None")
(setq mask_list (list (cons 90 2)(cons 63 0)(cons 45 dOffset)(cons 441 0))
dxf90 2
dxf63 nil
dxf45 nil
dxf441 nil
)
)
((and (= kWordBackgroundMask "Color")(/= (assoc 420 maskClr) nil))
(setq mask_list (list (cons 90 1)(cons 63 1)(cons 421 (cdr (assoc 420 maskClr)))(cons 45 dOffset)(cons 441 (cdr (assoc 420 maskClr))))
dxf90 1
dxf63 2
dxf45 dOffset
dxf441 (cdr (assoc 420 maskClr))
)
)
((and (= kWordBackgroundMask "Color")(= (assoc 420 maskClr) nil))
(setq mask_list (list (cons 90 1)(cons 63 (cdr (assoc 62 maskClr)))(cons 45 dOffset)(cons 441 2146608))
dxf90 1
dxf63 (cdr (assoc 62 maskClr))
dxf45 dOffset
dxf441 nil
)
)
((= kWordBackgroundMask "Background")
(setq mask_list (list (cons 90 3)(cons 63 3)(cons 45 dOffset)(cons 441 0))
dxf90 3
dxf63 256
dxf45 dOffset
dxf441 0
)
)
)
(setq emax (sslength ssMtext)
sscount 0
)
(while (< sscount emax)
(setq EN (entget (ssname ssMtext sscount))
tempEN nil)
(if (/= dxf90 nil)
(progn
(if (/= (assoc 90 EN) nil)
(setq EN (subst (cons 90 dxf90) (assoc 90 EN) EN))
(setq EN (append EN (list (cons 90 dxf90))))
)
)
(progn
(setq CNT 0
nMembers (member (assoc 90 EN) EN))
(if (= nMembers nil)
(setq nMembers 0)
(setq nMembers (length nMembers))
)
(repeat (- (length EN) nMembers)
(setq tempEN (append tempEN (list (nth cnt EN))))
(setq CNT (1+ CNT))
)
(if (> nMembers 0)
(progn
(setq CNT 1)
(repeat (- nMembers 1)
(setq tempEN (append tempEN (list (nth cnt (member (assoc 90 EN) EN)))))
(setq CNT (1+ CNT))
)
)
)
(setq EN tempEN
tempEN nil)
)
)
(if (/= dxf63 nil)
(progn
(if (/= (assoc 63 EN) nil)
(setq EN (subst (cons 63 dxf63) (assoc 63 EN) EN))
(setq EN (append EN (list (cons 63 dxf63))))
)
)
(progn
(setq CNT 0
nMembers (member (assoc 63 EN) EN))
(if (= nMembers nil)
(setq nMembers 0)
(setq nMembers (length nMembers))
)
(repeat (- (length EN) nMembers)
(setq tempEN (append tempEN (list (nth cnt EN))))
(setq CNT (1+ CNT))
)
(if (> nMembers 0)
(progn
(setq CNT 1)
(repeat (- nMembers 1)
(setq tempEN (append tempEN (list (nth cnt (member (assoc 63 EN) EN)))))
(setq CNT (1+ CNT))
)
)
)
(setq EN tempEN
tempEN nil)
)
)
(if (/= dxf45 nil)
(progn
(if (/= (assoc 45 EN) nil)
(setq EN (subst (cons 45 dxf45) (assoc 45 EN) EN))
(setq EN (append EN (list (cons 45 dxf45))))
)
)
(progn
(setq CNT 0
nMembers (member (assoc 45 EN) EN))
(if (= nMembers nil)
(setq nMembers 0)
(setq nMembers (length nMembers))
)
(repeat (- (length EN) nMembers)
(setq tempEN (append tempEN (list (nth cnt EN))))
(setq CNT (1+ CNT))
)
(if (> nMembers 0)
(progn
(setq CNT 1)
(repeat (- nMembers 1)
(setq tempEN (append tempEN (list (nth cnt (member (assoc 45 EN) EN)))))
(setq CNT (1+ CNT))
)
)
)
(setq EN tempEN
tempEN nil)
)
)
(if (/= dxf441 nil)
(progn
(if (/= (assoc 441 EN) nil)
(setq EN (subst (cons 441 dxf441) (assoc 441 EN) EN))
(setq EN (append EN (list (cons 441 dxf441))))
)
)
(progn
(setq CNT 0
nMembers (member (assoc 441 EN) EN))
(if (= nMembers nil)
(setq nMembers 0)
(setq nMembers (length nMembers))
)
(repeat (- (length EN) nMembers)
(setq tempEN (append tempEN (list (nth cnt EN))))
(setq CNT (1+ CNT))
)
(if (> nMembers 0)
(progn
(setq CNT 1)
(repeat (- nMembers 1)
(setq tempEN (append tempEN (list (nth cnt (member (assoc 441 EN) EN)))))
(setq CNT (1+ CNT))
)
)
)
(setq EN tempEN)
)
)
(entmod EN)
(setq sscount (1+ sscount))
)
)
)
)
)
(princ)
)