prs/prs.mobile.new/PRS.Mobile/CustomControls/ImageViewer/ImageViewerPage.xaml

<?xml version="1.0" encoding="UTF-8"?>
<mobile:MobilePage
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:imageeditor="clr-namespace:Syncfusion.SfImageEditor.XForms;assembly=Syncfusion.SfImageEditor.XForms"
    xmlns:mobile="clr-namespace:InABox.Mobile;assembly=InABox.Mobile.Shared"
    x:Class="PRS.Mobile.ImageViewerPage"
    Title="Image Viewer">

    <mobile:MobilePage.PrimaryMenu>
        <mobile:MobileMenuButton x:Name="_delete" Image="cross" Clicked="DeleteBtn_Clicked"/>
    </mobile:MobilePage.PrimaryMenu>
    
    <mobile:MobilePage.PageContent>
        <Grid>
            <Grid.RowDefinitions>
                <RowDefinition Height="*"/>
                <RowDefinition Height="Auto"/>
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*"/>
                <ColumnDefinition Width="Auto"/>
            </Grid.ColumnDefinitions>
            <imageeditor:SfImageEditor 
                Source="{Binding}" 
                Margin="0" 
                Grid.RowSpan="2"
                Grid.ColumnSpan="2">
                <imageeditor:SfImageEditor.ToolbarSettings>
                    <imageeditor:ToolbarSettings IsVisible="false" />
                </imageeditor:SfImageEditor.ToolbarSettings>
            </imageeditor:SfImageEditor>
            <mobile:MobileButton
                x:Name="_rotate"
                IsVisible="False"
                Grid.Row="1" 
                Grid.Column="1"
                HeightRequest="50"
                WidthRequest="50"
                CornerRadius="25"
                Margin="0,0,10,10"
                Image="rotate"
                ImageSize="30,30"
                Clicked="_rotate_Clicked"/>
        </Grid>
    </mobile:MobilePage.PageContent>
</mobile:MobilePage>