To add text to a sheet, you can replace placeholder text, or add a text box or shape then type text in them.
Double-click placeholder text, then type your own.
Some placeholder text is written in scrambled Latin words. The text you type will appear in the language you use for your computer.
If the template has placeholder text that you want to remove, click the text once to select its text box, then press Delete on your keyboard.
Click 
in the toolbar.
A text box is added to your sheet (you can change how the text looks later).
Drag the text box to where you want it.
If you can’t move the box, click outside the box to deselect the text, then click the text once to select its text box.
Type to replace the placeholder text.
To resize the text box, drag the selection handle on the left or right side of the box.
To delete a text box, click it (a blue outline appears around it), then press Delete on your keyboard. If the blue outline doesn’t appear, click outside the box to deselect the text, then click the text once to select its text box.
Text boxes are objects that can be modified like most other objects; you can rotate the text box, change its border, fill it with a color, layer it with other objects, and more. For more information, see Objects overview.
Every Numbers template comes with a default text box style, so when you add a text box to a spreadsheet and type text in it, the box and the text use this style. You can modify this default style—change the font, font color, color fill, and so on—then make it the new default style for the spreadsheet. Your default text box style applies only to the spreadsheet where you create it.
Add a text box to your spreadsheet and change it however you want.
You can change the font and font size, add a border to the box, and so on.
Select the text box.
Choose Format > Advanced > Set as Default Text Box Appearance (from the Format menu at the top of your screen).
You can change the default text box style whenever you want, and it won’t affect any text boxes already in the spreadsheet.
If you want to apply the same design changes to other text boxes that already exist in the spreadsheet, you can save the default text box style as an object style, then apply the object style to other text boxes.
Double-click the shape to make the insertion point appear, then type your text.
If there’s too much text to display in the shape, a clipping indicator 
appears. To resize the shape, select it, then drag any selection handle until all the text is showing.
You can change the look of text inside the shape just like any other text in your sheet.
To add a title to a sheet, add a text box and type a title in it.
Click in the toolbar.
Click the text box, then type your title.
Drag the text box to where you want it.