按照Ctrl鼠标多选图片，然后在任一一张图上右击，选择“大小和属性”即可。
全部图片的话我自己用的一个VBA，可供参考，如下：
Sub 调整图片大小快捷键()
Application.OnKey "^j", "a调整图片大小"
End Sub
Sub a调整图片大小()
Dim picture_total%
A = InputBox("固定高度：H" & Chr(10) & "固定宽度：W" & Chr(10) & "比例缩放：S", "调整图片大小", "H")
A = UCase(A)
picture_total = ActiveSheet.Shapes.Count
For i = 1 To picture_total
Select Case A
Case "H"
If i = 1 Then h = InputBox("请输入图片高度：", "提示：", "200")
ActiveSheet.Shapes(i).Height = h
If i = 1 Then c = MsgBox("是否同一水平高度？", vbOKCancel, "提示：")
' SendKeys "{TAB}"
If c = vbOK Then
If i = 1 Then t = InputBox("请输入图片上端位置：", "提示：", "200")
ActiveSheet.Shapes(i).Top = t
End If
Case "W"
If i = 1 Then w = InputBox("请输入图片宽度：", "提示：", "200")
ActiveSheet.Shapes(i).Width = w
Case "S"
If i = 1 Then s_old = ActiveSheet.Shapes(i).Height
If i = 1 Then s = InputBox("请输入缩放比例(100%)：", "提示：", "100")
ActiveSheet.Shapes(i).Height = s_old * s / 100
Case Else
b = MsgBox("您输入的字符不正确！" & Chr(10) & "即将退出程序！", vbOKOnly, "警告！")
Exit Sub
End Select
Next
End Sub
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