Canon 220 HS - Manual (Page 137)

Protecting Images
137
Protect images.
z Press the p button to choose [Protect],
then press the m button.
Choose All Images
Choose [All Images].
z Follow Step 2 on p. 134 to choose [All
Images], then press the m button.
Protect images.
z Press the op buttons to choose [Protect],
then press the m button.
You can unlock groups of protected images if you choose [Unlock] in Step
4, while in [Select Range] or Step 2 while in [All Images].