Look for a 'speckled' area in the lower right corner of the text box. You can drag the box out to a larger size, and type away.
The HTML process defaults to a non-word wrap idea, so full words are carried to the next line of type. As to typing "out of field", that is likely a local problem with the OS setup. Check the 'properties' of your screen settings.
Default resolution would be minimal 1024x768, but in a 16:9 ratio, for up to around a 17" monitor. For larger monitors, going out to 1920x1080 should give decent viewing results. For older 4:3 monitor ratios, you have to scroll sideways to get a full image view. Seems that all Web sites now consider users have a "wide" screen monitor... same for TV viewers.
Those of us who still use "square" monitors have to bear with it, or go for new.
This is a listing of Resolution Standards For Graphics Displays:
Type.........Linear Pixels (HxW)....Total Pixels...........Aspect Ratio
CGA.............320x200.....................64,200...................1.60
EGA.............640x350...................224,000...................1.83
VGA.............640x480...................307,200...................1.33
WVGA..........854x480....................410,240..................1.78
SVGA...........800x600....................480,000..................1.33
XGA...........1024x768....................786,432..................1.33
XGA+.........1152x864....................995,328..................1.33
WXGA........1280x800.................1,024,000..................1.60
WXGA+......1440x900.................1,296,000..................1.60
SXGA........1280x1024................1,310,720..................1.25
SXGA+.....1400xx1050...............1,470,000..................1.33
WSXGA.....1600x1024................1,638,400..................1.56
WSXGA+...1680x1050................1,764,000..................1.60
UXGA........1600x1200................1,920,000..................1.33
HDTV........1920x1080................ 2,073,600..................1.78
WUXGA.....1920x1200................ 2,304,000..................1.60
QXGA........2048x1536................3,145,728..................1.33
QSXGA......2560x2048................5,242,880..................1.25
QUXGA-W..3824x2400................9,216,000..................1.60
Aspect Ratios are defined by height x width
Aspect Fields: 1.25=5:4 1.33=4:3 1.56=25:16 1.60=16:10 1.78=16:9 1.83=11:6
F@H.. to solve mankind's maladies.. in our lifetimes!